When I was learning Linux back in the day, one of the most beneficial thing I did was to go though the VIM tutorial and learn to use it properly. I'm no master at it but oh boy that time spent has paid dividends down the line.
The Neovim Tutor is more comprehensive than the old school Vim Tutor. I recommend that people who want to get fast with the key commands go through it repeatedly until most of it becomes part of their muscle memory. When this happens, the learning curve starts looking a lot more approachable and less daunting.