I feel like when I rotate my 360s I'm landing on the tail of my board and falling. I'm thinking a it's probably because I'm leaning and pulling up on my front foot. Any tips to fix that?
My second is how can I have the most control while in the air? I feel like I'm very Up right when I spin. Will stance have an effect?
Thanks in advance
Firstly, are you doing a backside or frontside 360? Or is this happening with both types of 360s?
Basically it's either how you initiate your spin or how you pop that's throwing off your spin. No one can know for sure until you upload video, but those would be the two things that can send you off balance in the air.
1) If it's your pop
It's possible you aren't pushing off evenly off both feet to pop. You want to be pushing evenly off both feet to pop as you ride up that take-off ramp.
2) If it's your spin
It's possible you're not spinning straight and instead you're throwing your shoulder a little up or down as you spin, and that's sending your spin a tiny bit corked (off-axis).
You want to make sure you're spinning flat, roughly parallel to the jump take-off is how you want to be rotating your upper body as you initiate that spin.
As far as control in the air goes, it will come with time. The more comfortable you get with spinning, the more you'll have aerial awareness in the air and be able to not just be 'blind' in the air.
Once your aerial awareness starts improving, you'll be able to start bringing those legs up in the air, and even putting in a little grab. It's totally normal to be straight legged for your first spins, so I'd concentrate on fixing your spin technique first, then later you can work on your stance in the air (bringing your legs up, grabbing, etc).