Answer 1

With html and css you can only make static website like information displaying websites, which contains images, pagaragraphs , headlines, text effects etc.

Try to learn Java script to make projects even more dynamic and useful. After learning Javascript you can make Dynamic web pages, web applications .
You may try doing
1. Online voting website
2. Travel agency maintenence web page
3. Online shopping website
4. An online learning website
5. A business website