I really don't think you're too young to BC, I think it's great that you've decided to BC as young as you are. I wish I would've never permed my hair, but I did.
Also, you won't be able to know your hair type until after you've cut off the permed hair.
Just focus on taking care of your hair while in the braids, providing it with moisture.
I don't think you're too young to properly take care of your hair if you get the products it needs instead of going with what other people are using for their hair.
Hope that helps.
last relaxer; 082708, BC; 081810, CG; 122410
high porosity, med/coarse texture, high density, color treated