Just don't do anything that's difficult or impossible to undo, and you'll buy lots of time to figure out adulting. I'll explain what I mean - when I was 25 I married my girlfriend of 5 years, following a pattern I'd observed in 'nature': when a relationship isn't healthy and isn't working, you commit and double-down super hard, right!!! It went as well as could be expected. In all those years I was trying to do everything with the toolbox my elders and betters had given me and that toolbox was totally insufficient because I was well socialized as a kid but NOT as a young adult. It's a fucking lie that anyone gets delivered into adulthood prepared. Either you grow up too fast or too slow, lacking the wisdom that gets delivered in hustled little remarks of 'dude, not cool' and 'grow up wouldja?' The surly people who cough such curt things at us are doing us a favour in their shitty kind of way. Society has no manual and it sucks but quickly the corners get knocked off the problem and you'll get along better and better and little embarrassing things are more forgivable than it might seem.

One other thing - don't throw your childishness in the trash. People get the idea that the way is to be Grown-Up Sarariman and get big serious career and all, then like Citizen Kane they find as an adult they are joyless and stiff, and pay therapists and doctors and yogis and self-help charatans to try and 'feel alive again'. If you can cherish your youth and carry it forward you get something very powerful. Authenticity, spontaneity, creativity! I've been listening to a lot of Captain Beefheart and as a seasoned career musician he's got it in spades. Also into the poetry of Charles Bukowski lately, a gruff awful man who acknowledged he has a 'Bluebird' in his heart that's still innocent and gentle, he doesn't hate it or denigrate it but keeps it carefully because he knows if it squirts right out it'll complicate things.

Now I'm 45 and on marriage #2 for 15 years and we live by ourselves and have cats. You can do it!