It doesn't require some investment to get familiar with these programming language essentials; you can become familiar with the crucial things in a couple of months and begin making straightforward projects or applications. You don't require a particular domain since you can run and test your code even in the program. (Why Java is Best Programming Language to Learn in 2020)
All the JS frameworks are very inclining these days and it appears they will keep up their interest for a long time. ReactJS, VueJS, AngularJS, EmberJS, NodeJS, BackboneJS engineers are sought after.
In the advanced period, you don't have to go to class to learn; presently you simply need a PC and web association with open the learning application and begin learning.