Before start learning some new programming language you should think about what tasks that language can solve for you. The beauty of Python is that it can help you with any everyday tasks. You can easily find ready to use library or framework almost for any case you need to solve.
Do you need a web application or web microservice? OK, Django framework or Flask can help you. Do you need some tool for fast calculations and result visualisation? IPython, Pandas, numpy and scipy are great chose. Scikit-learn can help you with machine learning tasks. Do you need web crawler or some scripts for routine tasks, even gui application? Definitely there are some libraries to help you with rich documentation, examples and community.
But still you need to know Python well to use all that stuff correctly and efficiently. Here you can find some books that will help you jump start using python in a right way!