Body Hair

I’ve always been self conscious about my Body Hair. I’m 12 years old and my background is Italian but I was born in Australia and still live here. Everyone else that goes to my school is blonde and has thin hair and have no body hair. Whilst I have very dark thick hair. I’m the only girl who has her period at my school and since I’ve gotten my period my leg hair and arm hair has gotten darker and more noticeable. I tried shaving my legs but my mum said not to shave or do anything to my thighs bc it will get way darker. So I shaved my lower legs but u can see the difference from my thighs! I really need advice because I’m getting bullied about it!