Hi, @spsiddarthan!
We have had similar discussions here, in the past. Check out the following content:
Personally, I recommend React's official tutorial, to get started with. It is very well written, and will quickly get you up to speed with all the core parts of React.
The core concept behind React is really simple — your UI is a pure function of your data (state), go ahead with that in mind; and with the above aids, you will master it in no time. :)