While litchi is good you should look at autopilot from hangar also. The learning curve is claimed by many to be steep but it isn’t once you learn a few basic concepts and it offers significantly more control than litchi. I only use litchi now for flying beyond controller range as it is quick to wack in a rough and dirty waypoint mission. Autopilot will so LCMC waypoint flights now also.
It looks like Autopilot only works on Apple devices, and I have Android phones / tablets.