What courses I need to learn to be perfect in Web development?

Answer 1

It really depends wether you want to do front-end web development, back-end, or both (fullstack). In all cases, you should know basic HTML, CSS and JavaScript to start with.

For front-end you have to master at least HTML5, CSS3 and JavaScript/ES6. Later then, you may learn a templating engine, like Jade, Pug or Handlebars, and/or one of the many JS front-end frameworks out there, like React, Angular or Vue.

If you rather want to become a back-end web developer, you should pick up a back-end language, e. g. PHP, JavaScript/Node.js, Ruby, Java, Python, etc., and a server framework for tthe chosen language (e. g. PHP/Laravel, Node.js/Express, Ruby/Rails, Python/Django, etc.)

Answer 2

HTML5 for making pages, CSS for designing pages, JS for scripting functionality of pages.
So you need HTML5, CSS, JS i think.