Stupid email password mistake

I have 3 questions, which I've highlighted in bold. If anyone can help I'd be very grateful.

I created a new email (not the one I'm using here) to go with a publication just over two weeks ago, and I VERY stupidly didn't write the password down. I sent off a test email to myself at the time, to make sure the email account was working. Then two weeks later after printing thousands of copies of a booklet, I realised I hadn't written the password down, and after thinking long and hard about what I put as the password, and making 16 attempts to enter in variations of what I thought it may be, I've had no success.

I'm worried about doing an automated account recovery because they don't seem very successful from what I've seen online. If I do one and fail, will that cause problems for me logging in if somehow I end up remembering the password later (i.e. it doesn't let me log in because of 'suspicious activity' or 'extra security needed' or whatever due to the recovery attempt)?

Is there ANY chance of getting into my account with the help of an actual person rather than an automated system?

I didn't link the account with any backup email address or phone number. The information I know that may affect the recover process is:

The date it was created

The only person I emailed (myself)

The subject line of that email (well, it was either 'test' or 'Test')

My birth date

I am using the same device, but I have since moved to a different region of England

I have no previous passwords, but I saw from a YouTube video that you have to enter something in that field

Does anyone have any insight into the probability of me recovering my account with this info?