Learning C in 2023

I’ve got a need and interest in learning C for an upcoming project. I’m quite familiar with C# and JavaScript/Typescript, but have never dove into C. I know there’s a lot of resources out there but given that C has been around for so long it’s hard to tell discern what’s relevant what’s not.

I’d like to start with fundamentals and work my way into being able to navigate and contribute to an existing C codebase. I learn great with books and by creating little projects, but am open to any resources available.