I agree with 423, I can't believe that they don't want you to have a college degree anywhere in the world to be a competitive pilot candidate. Rahim you need to realize that there only the top 1% so make sure that you are not listening to a recruiter at all. Unless you have some "inside" track, then you need to have a good back up plan.
In terms of training, the goal obviously is to have strong legs and Butt. More than that, you need to learn to squeeze them very hard but still breath and focus on other things. I would suggest negative squat training. Light weight, super slow negatives; 30 seconds with most of the time in the last quarter of the movement. This will teach you to contract, breath and focus on form.