NEED HELP with next step after gathering my Seller's information

[Averie Smith]

Hi Everyoneeee!!! Im excited to say that I am working on my FIRST deal, which is a huge deal for me. I gathered my seller's information for the property. I checked comps, and trulia and Zillow for the numbers to see what to come up with. What property numbers do i pay attention to in order to come up with my numbers for my fee in making my Purchasing agreement? I believe i used the right numbers, i just want to be sure. Now, do I need someone to confirm my numbers before I present my Seller with a Purchase agreement? Also, after my seller and I agree to the agreement, i then take my assignment contract to my Buyer, correct? 

last thing, can a buyer for the wholesaler be a another Cash HomeBuyer?? Please BPC can you guys share some knowledge with a newbie working on her first deal???? thank yous in advance =)