Build build build. Go for hands-on learning whenever possible. Replicate your working conditions as best you can. Get used to building and deploying to whatever

Build build build. Go for hands-on learning whenever possible. Replicate your working conditions as best you can. Get used to building and deploying to whatever PAAS they presumably use. So in other words: Reading books is great (and you should do that too) but sometimes it's hard to know what to focus on or remember if you have no context. If you just start building web apps you'll be using all those technologies simultaneously (and understanding the contexts in which their various features are useful)and you'll be using your books more as references than anything else. The added benefit is that you'll naturally be dividing your time appropriately between the technologies.