All JavaScript frameworks are terrible – A case study in confirmation bias

There is no real difference, they all tend to get ideas from each other (for instance, Vue.js 2.0 picked a lot from React). So, Vue.js is perfectly fine – if you decide to be in the front-end development, you'll pick up other frameworks later, and for your own projects Vue is perfect.

Don't try to get everything on this hype train, it is not really that important – try to stay simple (like you don't really need this server-side rendering, dedicated state management, don't try to be "functional" – especially funny that not too many understand what it actually means).

So VueJS is absolutely perfect choice, both for simple and middle-complex fields – fast, easy-to-use, declarative, not too verbose. Also don't be afraid to not to use es6 processing through babel (if you target modern browsers like Chrome, a lot of stuff just works there – http://kangax.github.io/compat-table/es6/), or CSS-preprocessors, they are very helpful at scale, but often overkill for small projects.

I'd say define some side projects and try out different stuff for rendering the UI. Start out with a rendering library, not a framework. Check out stuff like react, preact, vue, inferno, mithril and pick the one which makes the best first impression. If you learn one of these, you can pick up any of the others pretty quickly. Because they aim to do one thing well, the learning curve is not too frightening. Pull in additional stuff (e.g. redux) once it becomes clear to you that you are running into the problem that it claims to solve. But not any sooner.

As for job opportunities, don't think too hard about it. The frameworks that you'll see listed in job ads are pretty much a time shifted image of what was hot three to five years years ago since a lot of projects will have bought into one framework or the other. These days I see a lot of angular 1.x jobs, and some react jobs. In a few years I expect more react. You need solid Javascript knowledge, a lot of curiousity, and just enough buzzwords to get over the threshold, and you'll be all right.

Take a look at the job search websites relevant to you! If I take a look at one of my countries most prominent job website I find 224 jobs for JSF and 93 for jQuery. For perspective: 99 for ASP, React 35, Angular 55, Angular 2 37, zero for my beloved Vue.js.

Is Europe that far behind regarding front end frameworks or is JSF the hottest frontend skill in America as well?

Have you looked into mithril maybe?