Thank you very much for your answer and for explaining the differences between architectures.
I've got a working armbian on this device in server / heedles version, and that's a good basis to build something on this device
https://forum.armbian.com/topic/12162-single-armbian-image-for-rk-aml-aw-aarch64-armv8/
And in order to continue learning about the arm, as you said, I will look for RasberyPi or nano because it is better for this purpose at every point
for my project I will probably buy some fanless miniPc / swith with normal Pc architecture
Thank you and best regards