[lmilcin]

Given the fact you already know some higher level languages I think the best way to learn C is to go low level.

C is fantastic language because it is within your reach to go and understand all small details of how various features are actually implemented. I find it very helpful to be able to understand how a piece of code actually functions on a low level.

Another tip: you are used to having high level features on your disposal. Don't try to duplicate those features. Figure out how actual C projects deal with program structure and flow issues that you are used to solving with high level constructs.

[__s]

CPython is a particularly nice codebase to dig into. Plus, there's a big todo list: https://bugs.python.org

[unnouinceput]

This^! +1

Also do it on a Raspberry Pi, it will allow to touch that low level better. Only flashing an LED through GPIO pins and is enough to grasp the basics.