[ryan-allen]

I'd check out Zed Shaw's book [0]. It's opinionated, but I think that's a good thing for something like C.

It's broken up into exercises that you start working through straight away, and you start early with valgrind.

[0] https://learncodethehardway.org/c/

[saagarjha]

The author of that book doesn't really like C, and it shows. And valgrind is usually not the first tool you should be using to debug memory issues–try Address Sanitizer instead.