I really want to improve my face (more defined jaw, more square, etc) and I found recently just found looksmaxing

I'm 17 so how can I do that? Did any of you try Things like mewing, fixing oral posture, etc? What else would you guys suggest?

I only want face and facial structure. I'm already taking care of my skin and hair

The one thing i still have to do to be able to see gains is get down to 10% body fat (I'm at 20-25 rn) which I'm working on.