Hint: We also have a Quick Start guide for beginners.
Axel Brandenburg gave a general presentation on the Pencil code in Oslo (2003): The Pencil Code: multi-purpose and multi-user maintained. (html, PowerPoint).
Wlad Lyra has written a tutorial for setting up global accretion disk simulations.
Wolfgang Dobler wrote Git Getting Started (Jun 10, 2016) and Git Best Practises guide (Jun 10, 2016).
Responses to a problematic git check-in and how to avoid it by Hongzhe Zhou (August 24, 2022), Philippe Bourdin (November 4, 2022 and December 4, 2022): How to commit without "Master Branch Merge"?.
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.