Also there’s just a ton of anxiety needing to move around constantly. Where are you exactly where that’s not a worry?

Depends on your motivation to live in a van. My parents just moved into a pick up truck turned RV because they want to move a lot. Travel around, see the world as long as they still are able to. It's not a thing to accomodate, it's the real deal to them.
(Though they are kind if priviledged they can afford this with an early retirement and by selling the house they owned.)

Yeh a lot of people do but I bought my van for 2 grand which was basically 2 months rent. There is definitely some anxiety in terms of I hope this shit doesn't break down as it is also my house but then owning or renting a house also comes with different anxieties based on different things and the constantly moving around part I loved.

I am UK based and just parked where ever I wanted to a point, as long as I was following the sign posted rules for parking up no one would say shit, parking is a civil matter here anyway so even if I had chosen to park somewhere that I was supposedly not meant to it isn't technically illegal if it was public land and the cops aren't coming out to do anything about it.