That Valve, the main sponsor of my open source work, has stopped for now to fund my work on KWinFT.
@Yann-Kaelig: Hi and thank you for your encouraging words. :) Learning C++ is definitely not easy and I also struggled with a lot of the online resources. It was really hard in the beginning and I got lucky because I had the time back then in my life to learn it nevertheless. But it's definitely not something you can learn over night.
I think the most important advice I can give is that learning a programming language has a much higher success chance if you do it as part of a project you are motivated to improve in some way. When in the end you see the fruits of your learning and hard work in something that is useful to you or even others, then that is really motivating to keep learning more.