Hey ,
Congratulations on your big steps . We all care for you and you will find here a lot of support and friendship , for when you are happy and when you might be less happy . I started transitioning later than you so I can't really give you advices about what you should do , I know high school may be a rough place so I wish you an easy journey . It is good that you have friends that support you , it would be more difficult doing this alone .
God , it is so weird when I talk with younger people , inside I am young myself yet everyone tell something else 🙂 .
I am excited for you and I am glad that you are excited too , it might be scary and difficult but it is great when you feel free .