I spin rightside naturally. I just learned how to do all my 3s last year, so I'm not that good, but what I would do to learn, and still do sometimes is before I hit the jump, just standing on the ground I look over my right shoulder, and twist my upper body until I can see my left ski, and then I try to repeat that body position in the air, because I find it helps me spot my landing. I've also noticed I carve and pop off my left ski pretty aggressively. Doing a safety grab on the right ski helps to control the spin, as well. before you do it on skis, practice doing right 360s just on the ground without skis on. You should join the trick tips cult, as mentioned, and/or the ASK TURPIN cult.