I need help!

I am relatively new to QB and, while I've learned a lot and have successfully been able to use the GoPayments app for my transactions and the QB Self-employed app, I cant figure out how to integrate my incoming GoPayments transactions with QB Online to keep my income/transaction records straight. I signed up for the 12.99 subscription for QB online, but the account seems to completely separate from my QB GoPayments account, even though I used  my login info to sign up for QB Online. It is not showing any of my Go Payment transactions  (only way to view those is via QB payments online and that is a very limited system/set up and I cant see cash transaction there, even though they are al recorded on my GoPayments App)

I have no idea why there are so many versions on QB and I don't know which one I need to keep my company's books!

Can someone help me please?

Thanks in advance,

Brittany