I go skiing with friends and they both really good at skiing, like off piste and doing jumps. I’m not as good and am scared I’l get hurt?

i like winter sports!

Take lessons and practice what you learn. Ski at your own pace and don't feel like you have to follow them wherever they go. Your excuse will be "I have a lesson", then meet up with them at the bar afterward and share your stories. Maybe you can find another friend to go with who is your ability level. Keep practicing and soon you'll be skiing with them--but you don't have to jump. Save your knees--you'll be happy later in life that you don't have to go for that knee replacement surgery.

Then again it is important to not miss out on fun experiences even though they may be scary

Carelessness is the path of death. Don't do it. Don't risk anything and don't gamble.