That feeling when you want to complete a big project, you start working on in immediately, chuck by chunk and then. You get burnt out or lost interest or doubt yourself. I wish it wasn't a thing, but it happens most of the time.
I was working on a large digital painting project. It was going to have multiple panels with various characters and symbolism, bordering and dramatic lighting. Only finished three panels :(.
Still though, better than not starting at all. Maybe I'm working too hard.