@yetiinabox For online #accessibility on a mostly Western level, this Wikipedia article is a good start (note the Standards & Guidelines at the bottom: https://en.wikipedia.org/wiki/Web_accessibility).
In Germany it's called #BarrierefreiesInternet. There's a Wikipedia article in German with further references for that too.
And, there's Jeffrey Zeldman's #BlueBeanieDay https://www.zeldman.com/category/blue-beanie-day/