How to complete Reading Comprehension Fast (Passages and Questions)?

Hi!

I have almost completed 1-month study plan. In my untimed practice, I am reasonably happy with my performance (got correct 3 out 4 and 5 or 6 out of 7). But when I try to complete it in timed practice, it gets extremely difficult. How to increase my reading efficiency? I can’t just skim through like Greg and automatically find the main idea within seconds.

Any advice or helpful videos, may be?

The verbal progression video