Super easy is a relative term 
It depends on how complex your system is. If you are going to do anything even remotely complex, I highly suggest taking some time to read up on the following topics:
Blueprint Interfaces(not to be confused with User Interfaces)
Delegates
Enums and Switch on Enum.
Structs (And to save you some frustration, if you use “Set member on struct” make sure you hide any unused pins)
Have Fun!!