To design or develop a website, these are to be considered:
1. Planning: Before you get a single idea about what your latest design is going to look like, you got to do all the appropriate planning.
2. Content Building: You have got to build all the content of your website after a clear planning.
3. Designing: Go ahead to design what you've planned and the content you've built.
4. Development: Go ahead to develop the website of your choice and be ever ready to sooth everyone's taste and go against your own opinion.

Go ahead to learn & use the necessary Languages for website design:
HTML
CSS
JAVASCRIPT
BOOTSTRAP
PHP and more.