Wigs Looking for Wig Texture Advice

I've started a two toned wig made of sewn wefts. I want to make the texture curly from the roots up. The white wefts are super soft and fine, and the curls go from 3A to 2A as I pull them apart in order to style them. While I can recurl them, I'm worried about leaving straight roots, especially around the more visible areas like the hairline and part.

The other issue is the black wefts I have are of a coarser, 2B-2C texture. I'm not sure how they will look with finer hair. I have pale blonde wefts of similar texture to the black, but I want the light hair on the wig to be as close to white as possible.

I'm looking for two pieces of advice. One is about keeping the hair roots up curly, and the other is whether I should be concerned about disparate textures from the different colored wefts.