I did a presentation on SDL with C for our online Knoxville Game Design meeting this month (December 2019). It’s intended for those who are already familiar with game programming environments (like GameMaker or Unity) and want to get started with SDL, so it is not an in-depth guide or tutorial. Basic things like getting a window on the screen, displaying sprites, displaying text, and playing audio. I also go into structures, pointers, and linked lists in C.
Here’s the video for anyone interested - https://www.youtube.com/watch?v=ZQ7BdGeo10s
Here’s the post with presentation slides and show notes - http://www.knoxgamedesign.org/1277/sdl-with-c-knoxville-game-design-december-2019/