@Keneda To be honest i don't really know what the problem was. I followed every step on how to install ubports to OPO and by doing that i bricked it because the program stopped seing my device in fastboot and all that happened in Win 10.
Anyway after all that process i did to try re-install ubports with ubuntu and not Win 10, it finally let me enter in fastboot mode and nothing more and even then i couldn't see my OPO in device manager ( something weird in my opinion cause i heard the connection sound when i plugged in the device).
And you know the rest of the story with adb/fastboot commands.
So i guess all that was a huge bug from Win 10 side.