Hint: We also have a Quick Start guide for beginners.
Wlad Lyra has written a tutorial for setting up global accretion disk simulations.
Boris Dintrans wrote a comprehensive introduction to Python and postprocessing with Python.
Matthias Rheinhardt presented a talk about the Yin-Yang mesh (10 Aug 2016)
A Python introduction can be found here: Python with the Pencil Code.