Ask HN: How to avoid overthinking when working on projects

I have this problem where I tend to overthink when I'm working on a side project.

In actuality I would prefer to build something crappy than to build nothing at all. At least that way I have something cool to show to people.

But I find it tough to stop my mind from thinking stuff like "this thing you're working on isn't going to work, it's probably not going to be useful at all. let's just stop working on it"

As a result I find it really hard to work on side projects and I end up wasting that time on consuming useless things like social media and video games.

How do I stop myself from overthinking when building side projects and just do it and finish it?