Okay, you have decided you can do it on your own. You don’t need a lawyer to review your agreement (at least until the proverbial you know what hits the fan). But let me give you some MasterCard commercial-like "priceless" advice:
READ YOUR AGREEMENTS.
I am honestly not trying to be a smart aleck when I say this. I cannot tell you how many times I have seen really smart business people fail to follow this simple plea. Just reading and actually understanding your agreements will help you avoid a great deal of trouble – with or without a lawyer.