While it's hard to recommend any framework/library, I'd recommend you start with something that is relatively popular and has a little more maturity. I recommend react because it is arguably the most popular out of the three, so you'll easily find support, and most importantly, a job with this. Vue is a good second option, and also great to learn. To my knowledge, it was actually created by some of the original devs of React. Not sure if that's actually true or not. On to Svelte. This one is actually really great, and I love the approach they took with doing all of the "dirty work" at compile-time. The problem is that it's relatively new, not as mature, and while you're never guaranteed to find a job with any language/framework, your chances are considerably less.

All of this being said, while I do recommend what to start with, just to get yourself into the industry. My personal recommendation for your future career, and just for fun, is to learn them all.