Love this idea. I'll give it a shot if I ever need to learn Redis. I'm a FAANG iOS dev who's guided a few people from 0 to dev job, so I was curious to see if you had a Swift track but it looks like not yet. Would love to hear if that's on the roadmap or not!
https://github.com/codecrafters-io/languages
Also, I wouldn't actually say we're the best resource to learn to use Redis (the Redis docs are probably more ideal) — we focus on helping you create your own version of Redis from scratch, so that you understand the fundamental pieces behind building a project like Redis. Same for Docker, Git, etc.
We do have a lot of users that actually discover Redis on our site, and do the learning Redis + building it out in parallel, often times while also simultaneously learning a new language!