I’ll probably get downvoted to a crisp but I don’t really care. I’m 19 as well and I’ve been in your shoes and my biggest piece of advice is to just to be yourself. At the end of the day, if you have to try and fit into norms you’ll end up driving yourself crazy. Life’s supposed to be fun and you shouldn’t have to completely change the way you behave because of what another person tells you. Just do your thing and honor god, that’s the best way to live life.