You are right m8 sorry!!
I was going mad,
so I updated to F10
had to do twice, because seems that first time (using the first of the 2 cryptic options) the firmware did NOT updated
Then I tried using only a usb 2 port for usb boot
and using this EFI folder (got from a dude on insanely)
I finally arrived and the installer and installed Mojave!
the system seems pretty stable,
all is working (just usb 3 ports are ONLY usb3 and not 2)
Also updated to 10.14.6
thanks for your help and sorry for the late feedback !