Hello, I'm currently participating in an SDL course initiated by some members on the GOG.com forums. However, we don't currently have a lot of participants and would very much like some more, so we decided to ask in some other communities. We're currently pretty much in the beginning so it should not be a problem for you to catch up if you start now (we took a crash course in C++ to start with, but the second SDL lesson was just posted today). We have forums where we can share code, get hints and ask questions and such.
If you're interested you can find the all the lessons and our forums here. Additionally, you can check out this thread if you want more info.