What 2 things do you think would make the greatest improvement?
1. If the camera allows it, I have the grid superimposed in the viewfinder. That helps to keep things straight.
2. Of course you pay attention to your subject, but check the edges of the viewfinder and see there something that's easier to eliminate before you click the shutter.
Don't rely on the "Auto Focus" to know what it is you're shooting.. But in my case with worsening eye sight, I'll have to take my chances with auto focus and hope for the best.
I see my picture and explore the edges all, the rest is habit. I shot slides and they good or no good for over 50 years and still think that way I guess.