Pflaumenkeks made some good points! Presenting and coming out in these situations can be really tough, especially when you use they/them...

And definitely work from friend circle outwards, I think? It's good to know that as you begin to build trust with other people about your identity, you'll always have a solid group of good folks to fall back on and support you.

Personally, I've had to pull some professors or college administrators that I trusted aside so I could tell them that I'm nonbinary and use they/them. It's not so subtle, but it worked out in some lucky conversations. As far as physical presentations go, I mix it up sometimes with some straight leg jeans, a binder, and a button-up, but I also like to paint my nails depending on the outfit or my mood. Other times I'll bind, but wear a skirt and big sweater, which isn't the most masculine-leaning, but it's nice for those more feminine days!

Good luck from another they/them user!! It'll take time, but I'm confident that you'll succeed in your own way!