I started learning react a few weeks ago and I've been using react-router and thinking about learning styled components or something similar. I have a few years of "experience" with toy <5000LoC "webapps".

I don't think they're that hard to discover, although I spent a while trying other Google searches before I realized react-training's react-router was the real router everyone mentions. Somehow their website seemed quite scammy, and I was very surprised routing wasn't in some sort of core/stdlib.