finished my app , now what?

[N8RzwA7f]

I'm mostly finished with my app in C++/sdl2.

but how on earth do I add a way for in game payment , which would give access to the full version of my game? I use one bool variable to toggle part/full versions, if that makes sense.

I'm also wondering how to add it to google play ? Do I just create an account upload it etc ?

have mercy this is my first app :)

thanks

[N8RzwA7f]

So any help? I created the app in orwell devC++ and mingw compiler if it matters?