Is it wise to ask a girl with four brothers out?

I know the question sounds ridiculous, but it's been a while since I have a crush on a girl. She seems really nice and humble and all I want is to tell her that I have a feeling for her and ask her out.
The problem is though, she has four brothers, all older than me and muscular af bodybuilders which intimidate me. I am a skinny and nonathletic guy which has nothing in common with those guys and I think even if she accepts me, they may not or even worse, make fun of me. Even she may think of perfect men as those kind of guys because of raising in such family.
Am I being stupid to think of these things as problems? I don't know what to do and feel frustrated. Should I tell her?
Is it wise to ask a girl with four brothers out?
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