I've been struggling with this myself, so I thought I'd repeat it for other people that might be dealing with the same thing:

Not every hobby needs to be a project. Not everything needs to be a whole *thing* with a goal and an endpoint. It's okay to not finish something. It's okay to pick up something for a bit, explore it, start making something, and then drop it without making any "progress".

Productivity is capitalist bullshit that doesn't need to infect your free time too. Have some fun