Hello! First off, congrats! I’m happy to hear that you have encountered acceptance :) does your school have a precedence for transitioning youth? If so (or if not) it may be a good idea to inform a school counsellor about your discomfort and work with them to improve your school comfort. This can involve changing your name on attendances, informing students and perhaps bringing in a speaker who can support your transition on a day when you are not at school. Informing all teachers of your identity and requesting they use your preferred name and pronouns. Arranging washroom/change room accessibility (gender neutral washroom for example).
If you happen to have a LGBTQ Organization in your community it may be a good idea to contact them to see if they might have someone on their staff who could help advocate for you/facilitate transitions in school.
Best of luck!! If you need any help finding resources/advocating please let me know :3