We will also have the instructions for building ESP32 and ESP32 Cam cars here. ESP32 is good for MicroROS programming too. Therefore some HiWonder cars use ESP32 microcontrollers too.
There are lots of great videos on youtube about the ESP32 that you could go through to get started
Some of the videos like this one are old but offer a good explanation. You could look at newer videos too
ESP32CAM is also a good device to use in your projects.
We will shortly upload the instructions to build an ESP32 car that could be controlled with a Playstation controller