This is exactly what I found as well! Writing things down forces me to consume content and makes me want to produce more as a result.

I made my own application as well at https://leftwrite.io though the focus is more on making notes on websites I visit than plain notes.

I'm still working on it but you can see how to use at https://nivethan.dev/devlog/how-to-use-leftwrite.html.

It's still very much still in progress for documentation but the core features I consider complete and so there won't be any functional changes.