I didn't get any replies but thought I would update. I got my highlights and because of my natural hair color he didn't have to use bleach and the highlights are very bright. My curl pattern is exactly the same and it looks AWESOME. I plan to go more blonde at some point, but I'm very happy now. He also shingled my hair, which I have never tried, and I have PERFECT curls. OMG, technique really is everything!
Anyway, if you have light hair and want to go blonde, it shouldn't be a big deal or too damaging.
3B with some 3a. Fell off but am now back on the CG bandwagon and looking for my HG products.