Batch files on DOS and Windows 9x (as well as BASIC) was my introduction to programming back in the 90s. The nostalgia is strong even though I’ve moved on to Unix long time ago.
Funny, I've had the opposite journey. I learnt Unix shell recently and then needed to use the Windows command line. Hence I found this guide.
CMD is very rudimentary compared to shell/bash, but it is quickly enough learnt for simple Windows tasks.