HI @fabiobassa! Thanks for your reply! It would't let me post in the same day, sorry for the delay.
It's similar to the link you posted. And yes, I tried multitool wich booted propperly, although i have to force maskrom mode after flashing the Armbian image because the device won't boot at all or show any signs of life.
About uboot and trustos, I didn't find any directions in how to extract them and pair them with Armbian. I just don't have enough knowledge to figure it out myself.
Again, thanks for your time!