Squats

The last few days I have been really working on doing my squats and I have been doing at least 100 a day. I'm trying to get a bigger butt and thighs because my legs are really skinny. But right now only my thighs have been sore and my butt hasn't been as sore. I think I'm doing them right but I just don't understand. I would also like advice on how to get my butt and thighs to be bigger. Comments please😊