Don’t be sorry! Writing about fighting when you have no practical experience is a difficult challenge and writing fight sequences when you do is still time consuming. There are a lot pieces working together and figuring out how they function is difficult and something very few writers actually do well.
Here are a list some of our posts that may be helpful to you:
Also check anything in our Michael Janich tag, he is a very good instructor who teaches self-defense. I refer people to his videos for the work he does with concepts, where he actively explains what a technique is, what it does, and why it’s used before teaching the technique. As a writer, you need both technique and concept before you can put it on the page.
I plan on doing a write up on both elbows and knees in the near future. There’s a lot of misconceptions about how these techniques work.
Also check out Tamora Pierce’s Tortall series particularly First Test and Page in The Protector of the Small quartet. Tamora Pierce is one of the few authors that write fight scenes I feel comfortable recommending for reference.