I don know much bout other languages only HTML and internet says it's not one of the best programming language so what to do?

Answer 1

If you want to be a webdeveloper learn first html, css and javascript.

Answer 2

HTML is a language that does one job: Set up the structure of a homepage.
There's no 'best' or 'not best' when you're assigned to a job and do it, right?
But as Ярослав Вернигора (Yaroslav Vernigora) said, CSS and Javascript will empower HTML with design and functionality.