I think, avoiding KYC verification will give you full privacy, do not give anyone your identity even in bounty campaigns.
KYC is only involved when you start linking bitcoin to the service providers that work with BTC, to send a simple bitcoin transaction, you won't be asked for your information (unless you use an online wallet).
What elements must one do I do a totally private crypto transaction?
Such as hide the IP address. Make sure Google doesn't follow. Make sure no trace is done.
What would be the main steps to follow to create a fully private transactions?
Actually its hard to do a private transaction because all of the transactions that we are doing is already saved in the database system of the crypto or blockchain, but as they mentioned above there is also a way on how we can hide our IP Address just like using a VPN to be able to change your ip address in one place to another, you can use it to hide your IP address and once you choose a country to be your location it will change automatically the IP address that you are using. I am pretty sure that no one can trace your IP address once you've used vpn, unless some IT people will try to find and catch your transaction.
It doesn't really matter though to be honest, there are over trillions of bitcoin transactions, and no one will be able to link you to one of them/an address if you follow the steps below.
If your scared about this, could always use XMR, they are pretty privacy-based.