Little Nav Map will give you everything you need to begin with particularly in ga planes and maybe a decent weather app
Learn how to use Vors, NDB’s, practice holding patterns then approaches and plates. Use checklists for aircrafts, try and fly by the numbers, look for airport diversions in bad weather
Try and do an Ifr or vfr flight without a map just using dead reckoning, it’s all part of the fun.
One app worth considering on flight sim.to also simulates failures which is quite interesting.