Where is the best place to find up-to-date information on stuff like layouts, and how to manage crossbrowser/accessibility etc? It's a minefield when trying to self-learn these things as it's hard to tell when info is wrong or bad practice, outdated, etc.

For example - is this CSS grid-generation/layout current best-practice for building the base, foundational layer for a simple static website? Say, with three columns, one centered and wider with content, the others narrow and empty - serving as margins?

And how would one arrive there, as a solution? Searching online turns up an infinity of options such that it's difficult if not impossible to figure out how to do things in if not maybe "the" right or best way, at least "a" right way.