I sometimes see websites on the forum that are OK on a technical level, but they could be transformed by choosing more interesting fonts with personality.
Recently I found a Youtube channel of Oliver Schöndorfer, who manages to make the subject quite fun, while explaining some of the important points like spacing, sizing for mobile, font selection and more.
He manages to explain why certain points matter without becoming too technical or serious, so if you want to learn more about fonts for your web design this is a good place to start.
He also has a website with various articles: