Answer 1

https://www.javatpoint.com/what-is-html
I think you should stay calm and go ahead in programming with first thing first concept.
2. first clear all your basic doubt. example : HTML why use, full name, all tags
and how run etc ?
3. search for video which is not understand.
4. be practice.

Answer 2

Do not panic!
HTML (Hyper Text Markup Language), is one of the web development languages.
Let's take an example :

Suppose, you draw a picture using a pencil -->HTML (you give a structure)

Coloring it with crayons/sketches -->CSS (Cascading Style Sheets)

If you want to make your drawing to function accordingly ... You instruct it..... --> what should be done when an instruction is given.... (Dynamic) ...... JavaScript...

https://youtu.be/UB1O30fR-EE do watch this video on HTML to clear your doubts
..

Answer 3

https://www.sololearn.com/discuss/814676/?ref=app

Answer 4

HTML is markup language for create web interface