There are 3-4 people on this forum who kind of oversee all activity and provide very useful information every time, every post, for any new member, who usually ask the same questions that had been already asked and answered dozens of times.
So we can see a pattern here. Even though there is that first and second post which explain most of the things, it is 100% obvious that that guide is not enough. From my own experience, if you are a first time xiaomi user, it just doesn't explain the procedure detailed enough. It gives the impression that it's easier than it is, this is why no one gets it from the jump. You just can't understand when can you update or how to do it. So instead of reexplaining dozens of times, maybe you guys can put together a better post, which explains everything step by step, in a way which just leaves absolutely no room for error:
-you have to have at least 15 gb of free space in C partition on your computer (I had just 5 gb when I bricked my phone the first time I tried)
-drivers
-ROM download
-how to enter fastboot
-how to check if phone is recognized by computer
-how to enter command prompt and what to write in it
You will probably say that it is already detailed enough, but it's not. I remember I just didn't get it what do you mean by change dir in command prompt, and I had some prior experience with things like this

)) I managed to change Sony Ericsson camera drivers 15 years ago.
So a true step by step (you click this, you click that) would be self explanatory.
Wish you all the best !!!