TWRP - Wiped Internal Storage now I can't boot into recovery - Xiaomi Mi A3 Questions & Answers

I've just unlocked the phone, via minimal ADB
tried fastboot getvar current-slot and got the output that my slot was a
then I've tried flashing TWRP at a utilizing
fastboot flash recovery twrp.img
then got the following output:
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash recovery twrp.img
target reported max download size of 803868672 bytes
sending 'recovery' (39780 KB)...
OKAY [ 1.663s]
writing 'recovery'...
FAILED (remote: (recovery_a) No such partition)
finished. total time: 1.695s
so, I've tried fastboot flash boot twrp.img
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot flash boot recovery.img
target reported max download size of 803868672 bytes
sending 'boot_a' (35452 KB)...
OKAY [ 1.063s]
writing 'boot_a'...
OKAY [ 0.183s]
finished. total time: 1.254s
then I've manually pressed the power button + volume up and successfully entered TWRP
there, I've gone to advanced wipe and wiped
Dalvik / ART Cache, system, Data and Internal Storage
I didn't know Internal Storage would give me problems... After that, I couldn't access my internal storage from the PC to copy the .zip of the custom rom.
Tried going to mount into TWRP to mount different partitions, no succes.
Then I thought that maybe if I restarted the phone it would be ok. So I've restarted and TWRP told me "no system installed, do you wish to continue?" I said yes.
Now, I'm stuck at fastboot and can't boot into twrp anymore...
I've tried repeating the same commands above and got the same outputs.
fastboot flash boot twrp.img got me the "OKAY" messages. But now, even if I hold the power + vol up button, I won't get to recovery.
I've tried
C:\Program Files (x86)\Minimal ADB and Fastboot>fastboot boot twrp.img
downloading 'boot.img'...
OKAY [ 1.291s]
booting...
FAILED (remote: unknown command)
finished. total time: 1.298s
because my frient told me to do so, but this command does not exist.
How can I proceed?

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Try using mi flash tool
I was also stuck in fastboot mode I then tried installing twrp again with no success.
So I then went and flashed stock rom again into my phone using mi flash tool.
(Having a new account, I can't post link to these files. So download the files from official mi website, it is available there)
Steps to flash
1- Place the Flash File on Desktop.
2- open flash tool application.
3- Assign the Folder path.
4-Go to slot a using adb
5- Click on refresh & then tap Flash button