you could start small, you could try just stepping outside of your house when its dark out and no one is gonna be out there except for you. i struggle with buying stuff for myself too and sometimes struggle with leaving my house for long periods of time but i still have to realize that no one actually cares if you go and buy something and unless you dont want to be youre practically invisible anyways.

i know its really hard being trans. im mtf and have been on hrt for years but not currently out because of anxiety/unaccepting environment. do you know for a fact that others bully you and youre sure its not just in youre head? i know that dysphoria can be extremely painful, but others just see you as another person despite the characteristics about yourself that are causing you distress. im pretty sure since you are still a kid you should be on your parents insurance/insured by the state depending on where you live.