OK, my Redmi Note 4 is the mido and just have to download mido rom, twrp and have to unlock the bootloader.Going by your post's this is not your first xiaomi device, so if you want to flash this weekly custom rom, you need to unlock your bootloader, flash TWRP and with that flash this rom.
Good luck with the unlock process, reports of people needing to make multiple attempts until successful! (spread out a week apart).
Thanks!