There are a couple of tools which gamify Vim. I personally haven't used them. But some say they're pretty good.
For me, what worked was just jumping in and going whole hog. I tried disabling the arrow keys in Normal Mode, so I would have to use hjkl for navigation. But my keyboard puts the arrow keys in easy reach (Kinesis Advantage), so it turned out not to be much of a need.
What you may like is turning on relative line numbers. That way you can visually see what line you're at, and how many lines away your target is that want to jump to. Then you can practice going 5k to go up five lines, or d2j, to from where you are to two lines down.
This article was actually eye-opening for me: https://yanpritzker.com/learn-to-speak-vim-verbs-nouns-and-m...
Maybe it'll help you too.
:wq