I am learning to code in React, a JavaScript language for web development.
Yes; ReactJS is a popular Java Script to learn.  Facebook and Instagram use this style of Java Script.  What are you thinking that you might do with such skills?
I want to start my own social media website. I want to innovate and introduce new features.
Then you are heading down the right track.  React processes user interfaces only!  So, a social media website would be perfect.  Do you have a name yet for your site, or is that top secret?
Still on the drawing board for that. Maybe something like Snapbook.
Just a little history for you.  ReactJS was first deployed on Facebook in 2011.  Later, Instagram picked it up in 2012.  It was finally open-sourced in the US in May of 2013.  So, it is definitely available for you.  Do you think you'll have a pay site, or will yours be free too?
It will definitely be free to use with targeted ads eventually bringing in the revenue.
React, was announced at Facebook's React Conf in February 2015 and open-sourced in March 2015.
On April 18, 2017, Facebook announced React Fiber, a new core algorithm of React framework library for building user interfaces. React Fiber was to become the foundation of any future improvements and feature development of the React framework.
On April 19, 2017, React 360 V1.0.0 was released to the public. This allowed developers with React experience to jump into virtual reality development.
On September 26, 2017,
on heating."
- "Everybody should design their own home. I'm against architects designing homes. How do I know that you want to live in a picture-window Colonial? It's silly, but you might want to. Who am I to say?"
- "Architecture is the arrangement of space for excitement".
- "Storms in this house (The Glass House) are horrendous but thrilling. Glass shatters. Danger is one of the greatest things to use in architecture."