well, after trying and trying and trying to flash "fastboot flash twrp.img" and failing several times, i checked
the "small guide listed" and sure enough it says boot twrp. that worked, then i forgot to download the zip to my device,
thankfully i could copy it over while in twrp, flashed it, tried booting and stuck on MIUI logo.
little did i remember, last time took 5 minutes to boot instead of booting straight away like im used to.
for anyone stuck on fastboot logo, simply change the name of the TWRP image to twrp and hold left select while right clicking
inside the window where you saved the twrp image, (given your on win 10) this will open powershell, type CMD hit enter
then type fastboot boot twrp.img hit enter again, THEN FOLLOW THE INSTUCTIONS ON THE PAGE THE FIRST PAGE!
you need to have your zip file already on the phone, or drag it to the phone, takes about 3 min (depending on how fast your phone is)
i flashed from .04 stable to .08 stable. so you shouldnt be stuck anywhere.