"discipline" seems to be a key word here.
I've been feeling similarly haunted by projects, which I now call a "one man war of attrition":
[1] https://taylor.town/attrition
It's a weird spot, because you need enough discipline to convince yourself to expend more effort than watching Netflix, but also not stress yourself out.
As a concept, "building in public" has been not great for convincing myself to do more.
I think TodePond's "slippy mindset" might be more useful for these situations: