The 2019 edition of Cody Lindley’s book is a good jumping-off point with lots of links to handy resources.
You can think of this as a short book or a long article, but either way it’s a handy overview of typography on the web:
A concise, referential guide on best web typographic practices.
Mind you, I take issue with this assertion:
Establishing a vertical rhythm is simple.
You’ll want to back this—you’ll want to back the hell out of this!
This looks like being an excellentâ€”and freeâ€”resource "...meant to provide web application developers, browser engineers, and information security researchers with a one-stop reference to key security properties of contemporary web browsers."