First off, the board should be fine for your bindings, just might have a little overhang, which is normal. However, if ur thinkin of riding more park that board is too big for u. As for 360's, there is no difference between skateboarding and snowboarding. Since u ride goofy, if u go off the heels its frontside, and if u go off the toes its backside. For 360's, you need more air and concentrate on using your shoulders and head to bring the board around because your lower body will always follow your head.