That's how I learned it. I got the extension for VS Code and just started playing with it. If I got frustrated, I would slap "i" and go back to my normal way of doing things. The frustrations went down and now I use vim bindings all the time. I'd also recommend getting a Vim plugin for the browser (https://addons.mozilla.org/en-US/firefox/addon/vimium-ff/). Totally optional but it really helped click in the j and k movements.