Where to develop junior frontend developer?

Question

Career in IT

Hello.
A little about your path. Worked as a web developer for several years. I made websites on CMS's, made up websites on freelance, but decided to develop further. For half a year I mastered js, react, redux, mobx. I got a job as a junior frontend developer in a product company and now I am doing light and medium tasks on the current stack.
The question is where to develop further?
Option 1 - backend - php, go, python, ruby, node.js, databases,
Option 2 - study js, react, its libraries, make a couple of projects for yourself,
option 3 - mobile development on react native,
option 4 - study other frontend frameworks: vue, angular.
Everything is equally interesting, but I'm afraid not to waste time there. Thanks in advance.

Answer 1

Grow in your area of ​​expertise. In your free time, study everything that is interesting. Maybe you will find something that will be closer to you.

Answer 2

a strange question, what is closer to you there and develop