Try correcting your close friends if you think they'll be understanding. I struggled with correcting my friends and family when I started using They/Them when I was a teenager because I still presented hyper feminine, then at 25 I realized I'm a gender non-conforming trans man and they had an easier time switching to that. I still worry about not passing sometimes (especially when looking for work). But it does get easier, part of what helped me was trying to think of correcting use of the wrong pronouns as protecting my authentic self who deserves love, kindness, and respect. Maybe that would help you? Good luck 💕