Regarding your brother, maybe you should try to talk to him about how money works in real life, see what he knows so far. Then you can ask how he feels about inflation, when suddenly you have the same amount of money but can afford less on it. Cases of hyperinflation can be interesting to talk about, such as a billion dollar banknote in Zimbabwe being nothing. Then, from that, you could move to talking about the ways Bitcoin is different.
Regarding NFTs, it's a dangerous business that can make one lose a lot of money with unfortunate investments, so you and your friend should be careful.

First of all I want to welcome you, the plan you are about to do is very good. You come back with reasons that can motivate others to learn crypto. I'm sure your 12 year old brother has thought well that he should learn about bitcoin. I just hope you never get tired of teaching him.

If your bother is really interested in bitcoin then there is no need to make your explanation fun or approachable either, just explain the facts to him and let him come to his own conclusions about why this technology is going to change the world, however if you can, try to encourage him at the beginning to only invest in bitcoin and leave altcoins alone for some time, as it is going to be very tempting to try to invest in those coins but he is not going to be ready for them due to his inexperience.

Our DFBTC economic model is mainly divided into three parts. As everyone knows, our previous information has explained that DFBTC is a cross-chain of BTC to other main chains to increase liquidity and diversity of DEFI investment. In our V1 version, we cross-chain to the Ethereum mainline and provide the community and users with diversified DEFI investment options. First of all, users can choose to make DFBTC by investing in shares. We are the first DAPP on the entire network to anchor digital assets with double interest, and the first DAPP on the entire network to anchor digital assets with 100% decentralization.

The first section is Staking
He can double interest, the user can get BTC and AOM at the same time.
The second section is the guarantor node
Guarantor node, with the corresponding mortgage assets custody BTC, can get the custody fee, as well as the mortgage assets income.
The third section is Lending
Users can choose deposit business and loan business, such as deposit one kind of high quality asset can earn interest, need other assets can directly lend other assets.

This just gives me an idea actually that maybe I need to do this! As in, give up all of this. Totally focus on my life and work and then come back after 5 years and see where everything's at

Of course, this is just an idea I know there's nothing to keep me away from reading forums and keeping on betting which anyway will always alert me to what goes on with Bitcoin lol

I am interested in your words who want to return to trading, with trading we can sharpen our minds to continue working, but to teach brothers who are immature to trade, I don't think it's time yet. because the first thing is psychological. But if it's just knowledge, I don't think it's a problem

Welcome back mate.

Please push your younger brother to adopt cryptocurrency and specially bitcoin because this is what their generation needs.

Yeah in our country it is rarely to find youngsters that wanted to learn crypto and blockchain , but with our help as mature yes they will enter and be successful here things that we are frustrated as late comers .

At first welcomed back to bitcointalk community, it's nice to have such mindset to educate younger one for getting acquainted with bitcoin foundation and knowledge, at the beginning of introduction of bitcoin and also the forum, the major objective while is created is circulates the knowledge of bitcoin to people the knowledge is unknown to, i have no Young one to bring on board via bitcoin, but at least i have queue of people who knows bitcoin today through me and I'm excited about it till date, i applaud you for teaching people bitcoin, on my own i think it's good to let children of ten years to know what is cryptocurrency so that they will know the rudiments of bitcoin before they will get to twenty years.

Welcome back and good luck on your next moves...
It's a good thing to share our knowledge with our loved ones, I  hope your brother finds Evey bit of your Bitcoin journey with interesting and gets willing to learn more about it, I'll also advice that you download videos on YouTube for his age so he gets to learn better...
 
Good luck