Just go for it. As long as you get around to 270 and can spot the landing, falling doesn't really hurt. If you're not gonna get to 270, stop at 180. Commiting is the big thing.
Just remember that with skis on, your rotational speed is going to be lower than on the trampoline because of the additional mass spinning at a larger radius.
The last 360 I attempted was 10 years ago. Made it 270 degrees, slammed into the ground and broke some ribs.
Sometimes it does hurt.