Or, you can start learning C and QT, this way you will know how to clone, edit, and release a coin.
Its C++ not C. There is a tiny amount of C in the code, but its mostly C++. Also QT skills are absolutely not required to make a coin clone. 99/100 times nobody touches the GUI. But if you are looking to do something with some uniqueness, that has elements to tie into the front end, then yes some QT skills are required.