That part is hard. I suggest starting small and creating something you want to use. My side projects usually involve a great deal of hardware design, with some

That part is hard. I suggest starting small and creating something you want to use. My side projects usually involve a great deal of hardware design, with some sort of challenge in SW. Once you have created the hardware, having something physical to remind me of the end-goal helps a lot. I have a lot of abandoned projects as well, but I try to at least choose the project so that I learn/relearn/practice something that interests me. That way, even abandoned projects have value.