I'm moving from back end C#(self taught) and want to learn how to build effective ecommerce and administration sites. I've built a few web apps with old ASP.Net tech before but not MVC, I'm gonna dive right into MVC 6, what's all the fuss about Angular JS? I suppose I'll have to pick up 1 javascript(arghh! ) API, which is the most mature and/or best for rapid design and easy data management?