Wanting another Name

Hi, When I came out it was really overwhelming to pick a name. I didn't have the typical reaction of choosing a name and feeling like this is me or that i love that name. So i just choose one of the names, but a few weeks i already regreted it a little bit. Since it is a rare name for my country and i didn't have the confidence to stick with it, it also felt really akward when my parents called me that. Because of that i decided to shorten it, i should have just choosen another name at this point tbh, but i had just come out to my extended family which was already nerv wracking for me and i didn't wanted to pull my name back immediately and I thoughti had to stick with it. Almost 3 years later my official legal name is now only 2 Letters short. Now i really dont like my name anymore i doesnt quite feel like me and with only 2 Letters it feels so incomplete. But i wenn to a new school after my outing and everyone knows me by this name. The good thing is that i am graduating in a few months, so i could change my name after that. But i would have to change it legally again which already was a lot of paperwork last time. I already mentioned this to my mom, she loves and Supports me but honestly even she seemed kinda annoyed cause everyone calls me this name already and she thought we were finally finished with paperwork. I also looked into making my name longer, but i didn't find one i like. Or i different spelling so people pronounce it right but wont have to adjust to a whole new name, but this only feels okay and i still would have to do this legally. Iam also used to my name know and then i would have to start offen and get used to a new name. I also would have to re come out to my family, which would feel so akward since also have severe sozial anxiety. On of my concerns is also what if i met people from my current school at uni or somewhere else i would have to out myself and explain my name change. But for months i have been thinking about how much i regret my choice, especially a 2 Letter name. But i have the fear of regretting my name again when i changed it, iam kind of a perfectionist.And i also wish i would have included my parents more or let them choose my name.

Sorry for ranting but i dont know what to do and I would appreciate some advice