The recommended stable OS for this build is Ubuntu 24.04 for Raspberry Pi.

https://cdimage.ubuntu.com/releases/24.04/release/

Download Pi flasher to flash an SD card with the image. 

https://www.raspberrypi.com/software/

Then plug in that SD card and flash that Pi

The SunFounder motor hat is what we use for this build 

https://www.sunfounder.com/products/sunfounder-robot-hat-expansion-board-designed-for-raspberry-pi

https://www.amazon.com/SunFounder-Expansion-Raspberry-Inclulded-Rechargeable/dp/B0CKTD7QJB

I would not use the bottom mount points and use smaller ones so something like this would work with the M.2 screws that come with the SunFounder Pi Hat

https://www.amazon.com/AVERZELLA-M-2-SSD-Screw-kit/dp/B091B76RRC

For the main body, undercarriage, wheels and horns:

https://www.printables.com/model/964421-tengu-marauder-frame

I ended up using these for my caster and wheels, reccomend you print in TPU for the wheels

https://www.thingiverse.com/thing:4764727

Cover the TPU tire over the wheel and mount it on the TT motor

Take the motors and put on the undercarriage make sure to screw in the motors to the mounts. Use self tapping screws

Using a flashing software such as Arduino, PlatformIO or such as this https://github.com/SkeletonMan03/FZEasyMarauderFlash

You will hold the reset button on the ESP32 board for 5 seconds and plug in the usb cord until a COM port comes up in either device manager (if windows) or dmesg (linux