Before talking how to do a nice backflip, it is neccessary to get to the takeoff like a skier. Look at how you look like on the inrun. You need to fix that extreme backseat first and ski better
From the shadows of yours it seems like it would also help you to work a bit on your switch riding skills. Once you start skiing switch with a bit more opened hips, you will find it much easier to both land switch and pop from switch back to normal. You can start with skiing switch straight with having your right ski a bit more in front than the left one. That opens your hips = they will turn a bit. Keep your stance narrow (no switch pizza) and work against the tension created by looking back in the direction of your riding. it is difficult at the beginning, but you will get after some time
yes it is. Keep your left arm active to land it clean. Right after you grab a safety with your right hand, use your left elbow to lead the rotation. It will keep your shoulders opened and you should stomp it like you never left the ground