AITA for not wanting to wear a dress to my prom?

I’m 15, a girl and I’m finishing my final year of school soon (UK). I don’t have any problems with my gender identity or anything, I just don’t do dresses or makeup, anything like that. I’ve been like that all my life, heavily influenced by my brothers. My mum knows this and she soo with it. I’m a big metalhead and all my casual clothes are hoodies, baggy stuff like that. I want to go to prom, but I want to wear a suit instead. I thought this was ok but when I told my mum, she got mad at me. She says she’s not letting me go to prom in a suit, everyone will “think I’m a lemon” (I don’t even know what that means). I feel bad because I never dress up or anything like that and obviously she wants to see me look nice on the night. I told her I’m fine to wear make up, do my hair nice, I just don’t feel comfortable wearing the dress. I don’t know what to do here. I don’t think I’d enjoy myself in a dress but I’m not sure if I should just brave it and wear one, or wear the suit and feel more comfortable.