Literally what you say, get more experience with it! Just install Python and numpy/pandas and start playing with them iteratively in the interpreter, or in a Jupyter Notebook.
Having said that, I really like this little book, it's $10 on Kindle right now.
https://www.amazon.com/dp/B01GIE03GW/ref=cm\_sw\_em\_r\_mt\_dp\_78FR67YFENJTW1H6RJ3X
And of course there's the Oreilly library we get for free.