Developer offer to wholesale. What contract can I use?

[Sherian Rodriguez]

Hi everyone my name is Sherian and I have zero experience in RE. I live in FL and went to a FB seminar and got me interested. I've been reading a lot and watching a lot of videos. I told my friend who is a developer that I want to flip houses and he told me he has a better idea for me. He offer me to wholesale his properties, to find cash buyers that want to invest money and then sell it to an end buyer. I don't have a RE license. He's going to pay me for the first transaction with the investor but how can I get a profit with the second transaction with the end buyer? What contract can I use to secured that property and be me the one who can find the end buyer? 

2. I also have a friend that is a Realtor and can find me investors. What contract can I use and how I can handle this transaction since I don't have a RE license?

Thank you in advance