Someone wanted to learn this too, so Grasp built them a personal learning path.
You can keep exploring this one or create a path like this one shaped around you.
Recommended resources
Module 1
HTML Fundamentals and Setup
Module 2
Core Text Content
Module 3
Links and Images
Module 4
Organizing Data with Lists and Tables
Module 5
Building Interactive Forms
Module 6
Semantic Page Structure and Validation
Module 7