Jamal, there's a few different ways to answer your question. Simply: if you want to find your state's real estate contracts, google "(state) residential real estate purchase contract," or change up that search for whatever contract you want to find. Second, in order to wholesale, you need to know how to write the purchase contract, in my opinion the best way to do this is to learn how to write a normal contract that has the "and/or assigns" verbiage, and also includes an option period with a low option fee. Third, my recommendation would be to practice writing these contracts! Find a property, even if you don't want to wholesale it, write a real contract, and then send it to someone to review. If you aren't a realtor, I would recommend finding a realtor in your state. I am in Texas, if you want to run your wholesale contracts by me, I'm happy to take a look.
The best way to learn is to take action. Use google, use youtube, use people from BP, get out there and just go for it. You're going to fail, and we all have done stuff wrong with contracts, so there's no harm if you mess something up! Good luck!