No worries I know many people in this situation and TBH it was the same for me until I decided to put myself some deadlines. I had Unity installed for months before I opened it for this challenge (for so long I had to install the new version). Setting up a deadline is hard but necessary, other way you can have a real objective such as showcasing your work to an event or talking about it to several friends. This way you HAVE to show progress because you have a commitment toward your friends ;)