How do you change your notification email address because i want to use this as my Apple ID

See:

Change notification email address in Apple ID https://discussions.apple.com/thread/251293293

How to change notification email address to allow for an Apple ID email address change https://discussions.apple.com/thread/7975198

What is my "notification email address"? And how do I change it? https://discussions.apple.com/thread/7798521

Apple hasn’t published any guidance for using an address again. Normally, if your e-mail address was associated with an ID in any way, for example as a Reachable at or Rescue e-mail address, then it can't be reused with another Apple ID for approximately one year. I have also seen posts that stated Apple told them there was a 30 day waiting period before the address could be used again.  You will need to get another e-mail address to use as your Apple ID or you can try waiting 30 days to see if that works.