Luxer, please.
Nobody is gonna help you if you don't take the time to read. We've all done the whole process with patience and a lot of reading.
Please go back the the guide, read it, read it again, try to follow it... and when you get stuck come back and ask the questions.
You will get help, but you must cooperate with the people trying to help you.
So, reading your issue, I suppose you're at 9.2.0 Downgrade, section 2, step 3. Which states the following:
- Press (Y) to downgrade to 9.2.0
- If you are stuck being unable to acquire the am:u service, power off your 3DS by holding the power button and try again (this can take many tries)