How to learn HTML?

1. Download a plugin called "Save Page WE" for Firefox.
2. Go to a webpage you want to modify:
https://devrant.com/rants/2261788/...
3. Right click and select: Save Page WE -> Save Standard Items
4. Edit page on your computer.
5. Upload to GitHub public repository for viewing:
https://github.com/Demolishun/...
6. Share preview link by prepending https://htmlpreview.github.io/? to said page URL:
https://htmlpreview.github.io//...
7. Any questions?