As a complete beginner, what should I learn first?

Answer 1

Depends. What would you like to focus on in the future? Web development or application/general development? etc..

Web Dev:
HTML, CSS, JavaScript, jQuery, SQL, PHP, NodeJS, React, Angular, etc..

App Dev:
Java, C#, C++, C, Python, etc...

^Good places to get started.

Answer 2

https://www.sololearn.com/faq/#q1

Answer 3

that's it..

Answer 4

Html then css then javascript