Hey @Emm22, you're very much allowed to use whatever that feels more comfortable to you, it is also okay to take your time exploring and experimenting what feels more you to you.❤
Hello @Emm22! Exploring our gender identity is a long and ongoing process, it's okay to take as long as you need while figuring out what you're comfortable with. Congratulations on figuring out that she/they pronouns are right for you.
You said you're not sure what to do. Maybe some of these resources could help you? This resource from The Trevor Project talks about coming out. And here's a how-to guide on pronouns - either to expand your knowledge or to give to someone else in your life that may be confused.
@Emm22
I guess you should just ask yourself a very basic question. How do you feel about those pronouns ? Do they sound right in your head ? Never be afraid to experiment, there is no shame in being confused, or retracting your previous statements. Good luck on your journey to self discovery :)