Well, every newbie in IT industry asking which language to study in order to get paid with well digits.

Every experienced developer is guiding them as per their convenience, let's consider John is an experienced developer & Mark is a newbie. Now before stepping in Mark started surveying about industry & asking everyone which language to study to hold the position in industry.

Let's say if John is an Android Developer, in such scenario John advises mark to study about Java or Kotlin.

If John is an iOS Developer, in such scenario John advises mark to study about Swift or Objective C.

If John is the Laravel/Codeignitor Developer, in such scenario John advises mark to study about PHP.

If John is the Web Front-End Developer, in such scenario John advises mark to study about HTML, CSS, BootStrap, etc.

If John is the AI Developer or Game developer using Unity he'll guide the same as technologies he is currently using.

But since it's JS stands everywhere & won't stab you in the technology limit I would like to tell you that learn JS First.

If you are willing to go in Web app development try AngularJS, ReactJS, etc.

If you are willing to go in Mobile app development try Ionic Cordova, angular-cordova, React Native(Most loved & preferable), etc.

If you are willing to go in Backend development try NodeJS, ExpressJS, mongoDB, etc.

If you are willing to go in Games Development development try GDevelop, melonJS, ImpactJS, BabylonJS, etc.

If you are willing to go in Games Development development try GDevelop, melonJS, ImpactJS, BabylonJS, etc.
& so on.

Try keeping hands on JS, Because JS Stands Everywhere !