Welcome to the datascience page.
The easiest way to learn is by doing some hard exercises.
Kaggle.com has a lot of different examples in both classification and regression.
Here are the variates of data science I’ve got so far.
Classification
Classification is when you try to divide your data in to groups.
Regression
Tensorflow
Tensorflow is a tool for calculating neural networks which is both regression and classification depending how you set up the network.