It's young adult high fantasy, yes. Roughly 85,000 words. BookScan is widely used to look at hard numbers for how a book is selling, but it only captures a portion of the market. It's by no means an accurate picture of sales. I'm not sure that's going to be much help when it comes to comps, though. You want books that are similar to yours in some way--whether that's characters, writing style, tone, etc. Less "my book is going to sell well because these books do" and more "this book would appeal to fans of these books."