I'm on the 6GB RAM / 64GB ROM china set.
Basically you need to download the India
fastboot rom and the EEA Stable
Recovery rom from here
https://mirom.ezbox.idv.tw/en/phone/lavender/
First flash the India fastboot rom via the MIUI ROM Flashing Tool. Take care to only tick the "clean all" box and
not the "clean all and lock" box
http://en.miui.com/a-234.html
For me, I then just run through the usual setting up of the phone, just to briefly see what changes are there. Put the EEA recovery rom in the phone or SD card storage, then I
flash custom RMN7 twrp from here https://drive.google.com/file/d/1nYu4gbLnGcoWnfXTOONwJk4ifc82l-Sc/view (need to use this specific version for our RMN7)
then flash the EEA recovery rom.
I kenna the android password lock when rebooted, so had to go back to the twrp and do a wipe (factory reset).
Then voila.