The second thing is mixed martial arts is not a fighting style. It is a sport. You need to learn each style that goes into mixed martial arts on it’s own in order to be successful using it in an MMA fight – and people just hate that idea. They don’t want to put on the gi, they don’t want to kickbox or box, they just want to do MMA. I’m sorry buddy; you aren’t going to get anywhere doing that.
I hate to be a downer, but Starting Strength is very useful for beginning lifters to read alongside a little bit of coaching from someone more knowledgeable and experienced.
On the other hand, you should not attempt to self-teach MMA out of a book. Combat sports are all best learned with close tuition, by trade experts.