Maybe this will help. A contract is the written documentation representing an agreement between two parties, and because of this, playing with forms is dangerous. "How come that wasn't in it" is, I am told, a common complaint when things go sideways, and believe me, sometimes sideways is an improvement.
So. Real estate brokers are not able to give you legal advice, but they are able to broker real estate. Avoiding one may seem like a good idea . . . ah, what the heck. Just go to your local office supply store. What could go wrong?
Your best bet is to contact a Realtor. He or she can provide the CAR (California Association of Realtors) forms that you need to provide to escrow to arrange the transaction. At minimum you need the Residential Purchase Agreement and a few disclosure forms. My guess is that a Realtor will be willing to go over the forms with you and recommend a good escrow person for a minimal charge of $250 -$300.
PS - I assume you are using an escrow company. You had better be. You want to make sure that no money transfers without insuring that you have clear title to the property and all deeds and conveyances are properly recorded and paid. Plus there are mandatory disclosures that must be provided to you by the seller in California.
Best of luck,
ERA Buy USA