I would start her on waxing.. as when she is 25 she will have much softer hair and there is a chance of less..
Coloring her hair. i was 16 before i was allowed to.. and it was ok , I was a figure skating dancer.

I did have to wait till i was 11 to pierce my ears.. and I will do the same with my DD.

Good luck.. whatever you choose will be fine!