As
@infinitanocte touched on, you've asked two very different questions: "How do I be a normal person?" and "How do I be a real person?". The first step, is to separate those. The path to becoming a 'real' person is in the opposite direction of trying to be a 'normal' person, I think.
I'm in a similar boat as you. Mid 20s, and my entire life I've been different, but the only way I've known to deal with it is mask, mask, mask. Putting all my effort towards trying to be normal, following the socially acceptable path in life, and leaving nothing for actually developing the person underneath. I don't even really know how to unmask, how to be myself, what that even looks like.
What I've come to is: trying to contort myself to fit somewhere is a losing battle. Even when it works, it's simply not sustainable. If I am ever going to find a place in life that I'm comfortable, and make social connections that I actually want to maintain, I can't get there by being something I'm not. If I were a puzzle piece, the more time I spend folding and tearing myself to fit somewhere I don't, the longer it takes to find somewhere I actually fit, and the harder it will be for me to put myself back together enough to realize it's where I need to be.
Inevitably, the more unusual you are the more unusual the place you belong will be. And when you're trying to break from a poor-fitting mold, and you're faced with material hardship and so much shame from others, it can be so very hard to believe that trying the same thing you've done 100 times before will finally yield results on the 101st. But all it takes is one. You can work at 100 different jobs that don't fit yet the only one that matters is the one that does. You can meet 1000 people who think little of you if you can be ready to meet the one that you click with. You can hear 10,000 different pieces of advice and try on 10,000 different philosophies if that's what it takes to find the one that works.
It really fucking sucks, I know. And the smarter you are the harder it is to keep moving forward when all signs point to it being dumb and you should just give up. But it's a way forward, and it's the only one I see; and the only way out is through, as they say.
I don't know your circumstances or anything so take what you want from this spiel and feel free to leave what you don't. From the sound of it these are things you've thought about already. All I'll say is that, even reaching out here means that you're trying, and as long as that's the case there's still hope.
A very good read:
https://www.experimental-history.com/p/theres-a-place-for-everyone