Replying to Spins

Okay I know there is like 10,000 360 threads but this is a bit different. It is my first year park skiing and I'm pretty comfy with front 2s, front swaps to switch, and back 2s to give u and idea of where my skiing is at. But, I just can't seem to spin. When Shifties felt awkward and weird, I took my skis onto the tramp and learned them there. When skiing off jumps, or attempting to get more used to the swing weight of my skis on the tramp, no progress has been made. I'm still stuck with this 360 that I have to crank a shifty around the last 90 no matter how big the jump is, plus my roitation is super slow. It almost feels like my skis are just making it impossible to spin and just so unnatural. When I don't have skis on and I'm on the trampoline, I have no problem with misty 7s, flat 5s, even a few bio 9's. I'm 5'9, 135 pounds so skinny af riding 172 honey badgers which are light af. How the hell can I fix this issue cause I see weak skinny guys able to spin pretty fast. Sorry about the long ass post.