I'm not sure of any. I do a bunch of embedded C code. I find a lot of C code tutorials are algorithm / datastructure focused. Which is ok to learn. You should

I'm not sure of any. I do a bunch of embedded C code. I find a lot of C code tutorials are algorithm / datastructure focused. Which is ok to learn. You should definitely feel confident in implementing data structures / algorithms in C. But I'm not sure of any good tutorials which teach you how to engineer C programs. There is no "one true approach" but you definitely need to take "a" approach to constructing C programs. You need to have really good convention about how to do various things and how to compose your software. Also C unit testing is often rare. I ended up writing my own framework (which I open sourced, but am neglectful with maintenace) with the idea you can run tests on embedded devices. Meaning it only relies on pretty vanilla C and has no memory allocation. But, definitely incorporate unit testing in your C coding experience. It will help focus you on not falling for the evils of the language