I've worked remotely from home for over 10 years now. Currently I'm fullstack JavaScript developer. In the backend I use node.js and in the frontend my own tiny library called RE:DOM.
I'd recommend to learn JavaScript and learn it well. It's the language of the future and you can do pretty much anything with it these days: web backend, frontend, mobile apps, smart tv apps, IoT, animations, games, ...
Good luck! 😉