It's actually relatively simple.

[1] Start it up; it connects to the Bisq network (P2P through Tor) and the Bitcoin network.
[2] Set up a fiat payment method under Accounts. This is kept solely on your own machine and this account 'ages' over time to get higher trade limits.
[3] Go to the Buy or Sell tab, depending on whatever you want to do. (buy or sell BTC, that is)
[4] Take an offer that you like and follow the steps.

Basically, whenever someone takes an offer, a multisig transaction is created between buyer and seller with the security deposits and trade amount (so the trade amount is 'locked in') and then the buyer is instructed to pay with fiat.
When they've done it, they signal it to the seller who shall check if they got the payment. If it got through, they must confirm, which broadcasts a spending transaction that sends back the security deposits and gives the buyer the trade amount.

1. The software can be installed offline (after downloading) but it needs to be connected to the internet to see offers or have your offers visible to others.  It's worth noting that the software connects to peers over Tor network.

2. You can trade almost any Fiat currency for BTC, not just USD.  There are plenty of digital payment methods that work well with Euros.  One in particular, Revolut can be used to convert many Fiat currencies to Euro, which may give you more flexibility if your national currency only has a few offers.

3. The software is free to download and install.  Fees are charged when you take an offer or create an offer.

4. Below I've listed a couple of links, one to the projects official site, their github page, and the ann thread here on the forum:

https://bisq.network/
https://github.com/bisq-network/bisq
https://bt.irlbtc.com/view/5230289.0

Wow, that is a troubling development.  Luckily I have plenty of offers in my national currency through other payment methods, but I do have a mostly dormant Revolut account.  Unfortunately this kind of thing is getting so common, even big banks have had leaks, Wells Fargo has had three in the last 5 years alone.  Obviously it's possible to do all one's transactions without a bank account, but being able to pay my mortgage with bitcoin sure would be nice.

Even bitrefill collects personal data, as described in their privacy policy.  I haven't used them, nor do I have an account, but I suspect the data they require depends largely on the services you request.  I don't suspect they need much to for purchasing giftcards, but I imagine they would need your real name and address to pay bills, not to mention your account number for the service provider the payment is be made.

The ideal scenario would be for most service providers and retailers to start accepting bitcoin directly.


But what does that really provide if a breach has already happened?  I understand that banks are more likely to spend more on network security due to certain regulations, but that only goes so far.  Leaks can happen in so many different ways, getting hacked is only one of them.  I suspect like most laws and regulations, these are largely intended to punish those who are found violating them, but can't really do much to prevent breaches.

Yeah, it's not like a lightning strike, lol.  I agree that thinking twice about "accounts" in general...  I think the best way to operate is to keep a minimal footprint.  The fewer organizations that have your personal data stored on their servers the more secure that data is likely to be.

Oh, that's a pity. Then I'm pretty sure it's not currently supported. You could try hopping into https://bisq.chat/ and ask them if it's planned and if so, when it will be added.
You could also try opening a thread about it on https://bisq.community/.

A quick search over there revealed the following, though:

Apparently, NGN was implemented, but after a change by your central bank, people couldn't send or receive money from abroad anymore, so it was pointless to keep the trade pair in the app. But as a local, you surely know more about this and may be able to get it listed again. It would be great if you could figure out whether those payments are working again and explain more details to the Bisq team.

For now, it seems to me that (as DireWolfM14 explained) you may be able to bypass that by exchanging NGN for another fiat currency (for example through Revolut) and then buying Bitcoin with that.

No, this seems like a local issue of your PC or browser. I don't recognize the error message, but maybe try downloading from GitHub instead:
https://github.com/bisq-network/bisq/releases/tag/v1.9.5

Here you have all the steps for getting started: https://bisq.network/getting-started/

I am not familiar with how it works in Nigeria and what restrictions you guys have over there, but can you accept foreign currencies and open a US dollar account for example? After you get the USD, convert it to Naira with your bank or an exchange office.

Unrelated to Bisq but in situations where my local fiat currency is not supported by a site or service provider, I can always take EUR or USD. Having a stash of USD proved quite useful in recent times as the EUR lost a decent amount of value against the USD and I took advantage of a favorable exchange rate.   

What version of Windows are you using, and is it up to date? A quick web search suggests this .dll is part of the Microsoft Visual Studio (Visual C++) package. Make sure this is installed and up to date. I don't use Windows, but I assume this can be done through some sort of package manager or update manager? If not, you can grab it from here apparently: https://www.microsoft.com/en-us/download/details.aspx?id=52685

In terms of NGN, there is an open issue to support Paga, which you might be familiar with: https://github.com/bisq-network/growth/issues/268

That's probably your issue then. Mainstream support for Windows 7 ended 7 years ago. It is an outdated and insecure OS. You should strongly considering upgrading at least to Windows 10, although obviously Linux would be a better choice all round for both security and privacy.

Why do you want to use Wasabi? In case you are unaware, they are pro-surveillance and pro-censorship and cooperate with blockchain analysis. I would steer well clear of their software.