I'm now with the ROM from xiaomi.eu
So, what went wrong the first time? I saw this time that despite doing the same things, after the script finished everything, it took some secs to see the MIUI logo, something that never appeared the first time. Also, because I used help this time to be sure that I wont have the same problems as first time, the technician installed me 2 drivers that where missing and the mobile wasn't recognized correctly. I have windows 11. So I guess check drivers, connect original cable directly on pc and cross your fingers that all will work ok.