[blaerk]

Excellent choice! I started off 2022 with learning c and it’s a lot of fun!

As some other commenters, I really recommend Modern C by Jens Gustedt.

If you’re on Linux you can use man pages for most or all of the c stdlib, it’s a really convenient way to check up on stuff directly from the terminal, less tempting to rabbit hole into something else while in a browser.

I started contributing to a really small open source project, it was less daunting than a large well written, well formatted project and you get to run into “accidents”, figure them out, fixing them, learning from the experience. I realise this is a matter of personal preference, for me it’s a nice learning experience.

Also having (or making) friends who knows c is really helpful.

Good luck!