I just purchased a couple of Raspberry Pi 3B+'s myself.  I have been digging into different things that I can do with them.  So far the only thing I have done is make a RetroPi.  Here are some more sites that might help you:

https://www.raspberrypi.org/documentation/usage/python/


https://learn.sparkfun.com/tutorials/python-programming-tutorial-getting-started-with-the-raspberry-pi/all