Hands on management boils down to this:
1. Charge at every possible convenient time if you are not paying a meter.
2. Keep it in EV mode in city driving, and HEV mode on highways.
3. Try to arrive at a charging destination (usually home) with no EV miles remaining.
You don't have to do any of this, but this is how to get best efficiency out of a PHEV. If that is too much trouble, you are better off getting a plain HEV. Less weight, wear and tear on engine and components, and better overall mpg that using the PHEV only in HEV mode.
2018 Kia LX HEV Metal Stream with Advanced Tech