Maybe you can’t. Look into lucid dreaming. It’s not 100% control necessarily, but you can have some control. It’s not something that you can just do inherently though either. It takes a lot of practice.

It’s one thing from Inception that’s mildly accurate. You can control your dreams, not like they can but it’s doable. Instead of a hostile mob chasing you if you’re a stranger, if you can gain control and try to change too much or change something too drastically, you’ll wake up.

An easy way I’ve found is trying to fly. Typically you want to hard wire into your brain “this is the start flying action” and it can come more naturally in dreams. I can’t make myself fly 100% of the time, but I can get it done fairly consistently. My current thing I’m working on is learning to inject specific things or at least go back to previous dreams.