Is vim relatively easy to learn?
Disabling arrow keys helps. The first things you need to know are:
1. h = left, j = down, k = up, l = right (so you can move around)
2. i/o/a get you out of command mode and allow you to start typing (and allow you to use backspace and delete)
3. escape puts you back in command mode (so you can use hjkl again)
4. :help in normal mode (absolutely vital. Vim's documentation is glorious)
You can start with those and actually get stuff done. Eventually you will feel limited and start looking for more ways to work faster. Congratulations, you've taken the red pill. It's a pretty deep rabbit hole.
Also, there are plenty of great learning resources. Vim comes with vimtutor, which I found to be extremely useful. Another one is
Vim Adventures, a fun little top-down adventure game where the controls are vim commands.