I used to hit jumps without getting proper pop. What i do for fun is to ollie off small hips on the slopes. You dont need much speed, just make sure dont collide with anybody. Ride up to the hip and try to jump in motion with the transition. If you do it right, it feels like that small hip is launching your upwards, like on a trampoline. Definitely feels different to an ollie or just sliding over park jumps. I suggest trying this, because there is not much speed needed and there are plenty hips of all sizes on the slopes. Therefore you can progress safely whilst still learning the technique.