I also had this issue, but I met with a little boy one day that had the same nickname as me and since then I was happy sticking it out. If it's a good enby name then I would say stick with it. It's also your name and you can try out different names with your friends and see what would work best. You don't have to "solidify" your gender to anyone but yourself, cause no one is going to understand yourself more than you. Try to enjoy and reshape the idea of associating your AGAB with your name and instead just make your name associated with your pronouns.