Wholesaling

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I'm located in California and trying to get into the wholesaling business. I want to strictly work for my family and family friends who flip houses on the side. Being only 21, i really don't have much experience in real estate, much less what contracts i should use. For example i don't know if i should use "an option to purchase real estate" or "purchase agreement," contract to tie the property up? The only reason why i would want to use "an option to purchase" contact is because it would be much easier to back out of a deal with than using the "purchase agreement." Also I currently got my real estate license but plan not to use it soon, thus i do not have a broker. Would i have to disclose anything about my license the seller or a property if i am wholesaling it or when i assign the property to a new buyer, any advise? 

Thanks

Alex Marin