There’s also a Python library (basically a set of commands you can use to control the robot) available to go alongside the HAT, which will let you write software to control the robot parts you’ve got ...
Here is another Lego-themed USB hub, although I don’t think this one is an official Lego version, the Lego Brick USB Hub. This fun Lego USB hub comes with 4 USB 2.0 ports, and measures 119 x 30 x 22mm ...