yay for trying things out!
honestly when i fully realized i was non binary i just took a friend shopping and told her on the way “oh btw we’re shopping in the male section cause i just found out im not a girl” and then it was a great opportunity to try things out with my gender
so i would advise to talk to your more open minded, tolerant, trans-friendly friend(s) and just ask them if you could try something. if it makes you feel more at ease, emphasize on the fact that it’s just an experiment and that you have no certitudes. if you don’t have such a friend, you can ask people on tumblr instead!
and of course you can still use your birth name with different pronouns. it’s not uncommon
if you want, you can send me your name either by ask and dm or i can write a short paragraph where i would talk about you using they/them pronouns?