Forscan advice

I have a 2018 f150 lariat 4x4. I want to get forscan, but I am not sure what the minimum cost would be. What kind of laptop can I get away with and what other items will I need ? I already have a OBD2 scanner, but it’s pretty cheap and has no spots for additional inputs. New to the truck world and trying to make smart upgrades. Thanks for any help.