So I'm tomboy even though I am female I want to dress in guy clothes

But I'm too scared to ask my grandpa to let me shop in the male section even though it would probably make me feel better like it makes me so anxious to ask him (which is why I haven't told him that I would kinda lile my name to be Kirby) but I just can't wait to get a job so I can get my own clothes and if my grandpa complains about me getting guy clothes then i could reply with that I used my own money to buy it and like honestly the only clothes that will make me feel ok is hoodies, flannels and tank tops depending on it but hoodies and flannels are the things that make me feel good about my body so yeah but that would change if I got some male clothing because I love how they look. And I hate being forced to wear dresses so if I dress more masculine that would be great but yeah let's hope one day I can ask my grandpa to let me shop for those things