@Gina I would sharpen my Python skills first (that will give you a high-level language which is very flexible and used) then go straight to C++ without thinking on C; as languages they have similarities, but the object-oriented nature of C++ makes it radically different to C in the way you approach a problem.
@rpalomar I'd like to become better at scripting, thus Python, and at contributing to FOSS webapps. In the very far future, I'd like to maybe see if I can contribute to LibreOffice (C++), but that's not for now.