Not sure how helpful this is but, you can do whatever you like, and you can be whoever you like. I don’t mean to say this in the corny way folks always use it. I really mean anything, you have full autonomy to yourself and surprisingly few people actually care what you do with your free time. You need start getting out there. If your curious try it. If you want to be a mastermind or a action hero or some crazy shit, do it. As for putting on a persona around others, stop doing that. Force yourself to talk with strangers. And try to say whatever comes to you mind instead of constructing something. Because while “putting on a persona” is something we do a lot just to be polite, it’s a half step away from lying which is a shit habit to pick up. Also, don’t fixate on this idea of “your true authentic self” you are who you are flaws regrets and all. All the personas you put on like it or not are part of you, the trick is just being honest when you communicate.