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!