I'm going to answer this two-fold and relate it to what I'm going through. Feel free to shoot me some advice as well.
On the surface, you clearly don't have passion driving what it is you want to do.
I can relate to this because I'm learning to code. It was a struggle until I found Codewars, at which point I was able to easily turn on some music and sink hours at a time solving coding challenges.
Turns out that the skill of solving these things doesn't transfer to.. anything. I struggle to sit still going through any tutorial and I still have no idea how to build things.
So, on the surface, find something that motivates you.
Digging deeper, this inability to finish anything I start seems like a personal issue. I've worked a lot harder than this before.
I think there are facets of my life, and probably yours, that need to be put into order first.
There's a satisfaction with life that I've had before and currently it's missing. I'm unable to stick with anything because I immediately seek cheaper forms of satisfaction. I think attaining a more genuine satisfaction with myself would eliminate this urge.
Maybe you feel similar.
Also it obviously sucks to do things alone. Meetups, even when they lead to nothing, are still a big source of motivation. Personally I notice my productivity correlates with how often I'm going to meetups.