I feel like I post this every day or day and a half, but I don't think it can be overstated: Avare, FltPlan Go, I'm pretty sure ForeFlight, and possibly others can be used with flight simulators like X-Plane (and Avare at least has its own 'simulator' mode). I've gotten a TON of practice fidgeting with my phones/EFBs without burning dinosaurs, busting regs/airspace, or endangering my life. When I finally connected my (Android) phone to the Garmin GTX 345 in our club planes, I was way ahead of the game and could USE it in brief glances instead of learning it on the wing. Even if you're not really into flight sims, I think for this alone something like X-Plane is worth the investment. Similarly, I saw someone recently mention not getting VORs. Again, flight sim it until it makes sense. I've done the same with the autopilot in our 172SPs. Cheap practice.