I’ve been making little movies on iMovie for awhile, it is pretty user-friendly. I would know more if I had the patience to sit down and go through the tutorials, but I’m always ready to get started on something when I sit down! I knew a split screen had to be in there somewhere, so I googled it and found out where the controls were.
I love clawhammer banjo, and it is not that steep a learning curve, once you get the hang of the basic rhythm.