My brother is a surfer, or a wave rider. 
that's really awesome! I always wanted to learn how to ride waves but honestly i get so scared when i see a big wave coming my way
Body boarding may be a better option for you! This is where you lay on your belly on the board. Easier to keep balance.
i tried that and guess what happened? the wave hit me so hard i hit my stomach on a board and it hurt really bad
Oh no that sounds unpleasant! Maybe you should just watch then. Some people surf on their knees, it's called knee boarding!
i've never seen anybody knee boarding! I feel like it's harder 
I would think so. That and stand up surfing seems to look the hardest. You have to have great balance.