Getting Started with Maquuen plus v3, using python or arduino??

I just bought a macqueen plus v3, not realizing I needed to buy a micro:bit or unihiker board to go with it. I have never used a a micro:bit, I figure its like any other dev board though.

The problem I am having is with the actual robot kit, all the examples I see are in some visual scratch/blocks type language. On the macqueen v3 page it says it is compatible with micro python and ardunio. What is the easiest IDE to use with the micro:bit and the macqueen? What is the stm32 micro on the bot for? Are there libraries to access its functionality? Is there schematics for the macqueen v3, I cant seem to find any so i am not sure how I would know what pins the motors/encoders/sensors etc are connected to the micro:bit on? I feel like there would be a basic example showing how to program the the microbit with ardunio and control the motor drivers/count the encoders. 

I would really like to make boards with different micros that can fit in the expansion slot and control the bot, but with out schematics and ardunio/python libraries I dont think that is possible.