I would say don't try to learn everything at once. Pick a thing learn it well move on :) Don't get caught up in the hype (yes that's hard). es2015 brought a ton of new features all at once but won't be the case for future versions. This site http://es6katas.org has been helpful for me. Take 15-30min a day if you can to learn something new. Over time that adds up to a ton of learning.