The book I've been reading to learn about HTML is HTML and CSS. Learn the Fundamentals in 7 days by Michal Knapp. The book is a bit old for the internet age (it's from 2017), but I need to start somewhere right?

The advice I ignored is the SEO one's right at the beginning. Another of my goals learning how to do a website is learning more SEO. But its advice is outdated. Google publishes at least 2 updates a year to its search engine, so I can't expect a book from 2017 to be on top of the subject. Even some SEO people aren't on top of the changes. So...

On another hand, the book is 100% beginner's material. They explain everything so it's going to be a fun journey.