Wigs/shaving my head?

So, my hair is EXTREMELY unhealthy and damaged. I’ve done damn near everything in the books to it and it’s fried and damaged. Won’t grow. It’s awful. It’s thinning and falling out. I want to shave it off and start over but I want to find a good wig first because I don’t want to be bald. I’m not confident enough to pull it off. Anyone know where I could get a good, realistic wig? Thanks in advance!!