According to (chillfactore.com), you are going to fall quite a bit when learning to snowboard so make sure you fall uphill rather than downhill. Also (chillfactore.com) says that you should stay relaxed when you fall and to not put your hands out to break your fall because you will damage your wrists. When riding on rails or boxes it is important to not fall down on them and rather fall off to the side because it is less painful and snowboarders behind you will not run into you. Watch out for other objects like trees and rocks and especially take caution over ice. It will hurt if you hit any of the objects and the ice will speed you up exponentially and hurt a lot if you fall on it. The only terrain you should be using is in the terrain park.
Bad Wipeout
Snowboarding 