My 2 cents would be, learn Javascript and learn well. Not necessarily to start with any framework or libraries. Learn the core concepts of vanilla JS, realize those with good hands on opportunities. If the base is strong, rest are easy. You can pick up on any frameworks, libraries with ease.
My learning also says that, many of the core concepts of Javascript need repeats and going back to it time to time. So never be upset if you have to do so.
I admire couple of resources that helped me lot... You can check those out too..
Javascript: The Good Parts By Douglas Crockford.
A Udemy course called, JavaScript: Understanding the Weird Parts by Alicea. udemy.com/understand-javascript
Next or in parallel, I would suggest you to lean Node.js and its ecosystem. Knowing Javascript fundamentally plus node.js is like you have got all ingredients to cook any dishes you would like to, at leat in 2019 and may be few more years to come.
While you creating the base stronger on Javascript, step in learning any Frameworks or libraries that you are inspired by or more hearing about. It could be, React, Angular anything.
Hope this helps. Encourage you to read through all the suggestions and sketch out a plan ahead.
Good Luck!