Flight classes are a must where I am from, and let me tell you, you will 75 percent of the time not be a flyer on a higher level team if you are on a level 1 team, this is just how it is, they mostly become bases because level 2, 3, 4, 5 have more abundance's of flyers. On top of that, the biggest advice I have is to squeeze and be tight because then your bases can actually help. Working on stretching and body positions are good and try and take pictures of your BP so you can see more on how to fix them. :)