I learned editing two decades ago on FCP. iMovie is functional for those on Mac who don't need anything crazy, but for Windows, the free version of DaVinci Resolve is pretty solid for a free software. I think DaVinci is available on Mac as well, but having learned years ago on FCP, I have a comfort level there that I don't have with other programs. And as a bonus, for anyone who has some of the early HD MiniDV camcorder (or even if you have an old standard def MiniDV that you'd like to play with), FCP can still import those directly from the camcorder with an adapter going from FireWire to Thunderbolt. As a bonus, you can still hit control the camcorder playback directly from the FCP software without having to touch the camcorder when you import (which is how we imported everything back in the day). FCP is pricey, but worth it once you get to the limits of the various free options out there.