Place the (your) hand closest to his hip on his hip bone, the (your) hand closest to his neck on the side of his neck. Then buck hard and push him down towards your legs quickly and as hard as possible. This creates space for you to roll and face him and shrimp into guard or set up an arm bar from there. ANother way.. but way more advanced is to create space, again, then grab the wrist of his hand thats closest to your head with your hand, push it back to his hip, sit up and get the kimura in there. Start the kimura and crank it till its at the point of tension, buck and flip him towards the opposite side. I am half assed-ly explaining this Kimura reversal from side control because quite frankly, its really complicated and I don't want to spend 2 hrs explaining it , but its a worthwhile technique to learn. Ask your teacher when you get the chance.