ergonaut.space is a community-driven site set up to help consolidate the vast wealth of information that is fragmented around the web. The site is backed up on Github automatically on a regular basis to prevent data-loss/vandalism.
The site is written in Markdown, which is trivial to pick up (you might’ve already used it before without realising), but there is a fully fleshed visual editor which makes it even simpler.
The platform supports several regional languages.