Youyeetoo AIOT-3568A

Hi,
Is there any instructions on How to build and install linux (ubuntu) on my new Youyeetoo AIOT-3568A Rockchip RK3568?

Can any share the instructions (step by step) on how to install ubuntu instead? Something like this, but for AIOT-3568A:
https://wiki.youyeetoo.com/en/YY3568

Thanks!

Firmware

The AIOT-3568A is only available with non-open source Android firmware.
Hardware resources can be called via API.