General information on HTML:

How to start a HTML Document: https://prog.code.blog/2019/02/27/starting-a-html-document/

Tags: https://prog.code.blog/2019/03/01/tags-2/

Ways to customize a HTML website: https://prog.code.blog/2019/03/13/html-stylization/

HTML Reference – also has some  tutorials on HTML, CSS, and other things under the technologies category in the top left.  https://developer.mozilla.org/en-US/docs/Web/HTML/Reference