mailanik

So the application that I am currently working on has a backend written on PHP (CodeIgniter) and MySQL. I am using AngularJS with Yeoman Angular Generator for frontend. It's basically a SPA. The backend is written to serve as REST api with multiple endpoints. I want you guys to give feedback on my tech stack choice. Thanks in advance. (the application is yet to be deployed)

I want to develop a dashboard for this application in which I want it to update realtime. I was wondering if Node.js with socket.io is a good choice. I would also want to know how to integrate it with my PHP and MySQL backend?

I know Data Science, Machine Learning, Data Visualisation these words are the buzzwords these days. But I intend to start learning them in steps and properly.

I want to know and good source to learn Data Science e.g. Where can I get large datasets (open source)? How to play around with them? How to visualize them?