Do i have to learn HTML also before moving to JavaScript and jquery.....as bcz i want to work on react native platform

Answer 1

You should build up strong web foundation on HTML, CSS and Javascript especially ES6 (React uses ES6 a lot) first.
Once you have web foundation, you should learn ReactJS, before learning React Native.

You can skip jQuery, it's not needed in any JavaScript frameworks like React.

https://www.sololearn.com/Course/HTML/?ref=app
https://www.sololearn.com/Course/CSS/?ref=app
https://www.sololearn.com/Course/JavaScript/?ref=app
https://www.sololearn.com/Course/react/?ref=app

The following is a great guide on learning ReactJS in 2020 which including React Hooks.
https://dev.to/codeartistryio/the-react-cheatsheet-for-2020-real-world-examples-4hgg