The biggest problem is doing something alone, not having someone to pay attention to your progress can be really demoralizing. I hope to get back on working on my game development related things. Its just not easy finding something you really enjoy. I was busy with a C++ guide but wasn't statisfied with the formatting and examples so decided to scrap it and rewrite it.
I hope to have more positive news soon, I had an idea to have a engine similiar to something Sierra made where you basically make an engine where you build the game from scripting. But doing it alone might be a bit hard. And learning maths sucks :D