I started a new job and went from 0 JS (other than some JQuery and knowing the syntax) to 100 with Ember. Ember is really really good for beginners, grandparent talks of having to know transpiling, broccoli/task runners and livereload but doesn't understand that you need to know none of that to get working with Ember.
Write your app by editing the files ember-cli produces. No transpiling, or add transpiling with a single 'ember install' command. Who cares about broccoli, I just edit my ember-cli-build.js file with some paths and it all works. Livereload is hardly difficult to understand, with Ember you just run "ember serve" and it also all just works.