Popping is over rated. Don't obsess over it. Learn to pop on straight airs. It'll help you suck your knees up into your chest and set your trjectory. It doesn't take much so don't go super-thrusting like some retard.
When spinning, some jumps don't require any pop at all. Start with small jumps, learn 180's. They require a little pop. After that, you'll learn your 3's. You can play with how much pop depending on the jump. Really, you just have to go practice it to get the feel of it. It'll come naturally.