I love typography. I think the interrelation between two sets of fonts is fascinating. I think they can make or break the style of a web page, and are a super subtle but important part of a website experience.
One resource I use all the time when I design websites is Font Pair. It is a site that goes through some of the most popular fonts found on Google Font and pairs them together.
As someone who appreciates typography, but doesn’t know a lot of the intricacies that go into pairing fonts together, I find this site extremely helpful. It has helped me as I start to develop my own sense of which fonts pair well together and which do not.