Unable to save settings in mail app for Mac OS X for iCloud mail?

Question

Hello
I have two questions really.
1: I wanted a new email address, was happy to see I could create an iCloud email address - but it seems you need an initial email address to have an iCloud email address. As in, I couldn't use it as my apple ID?
2: I cannot save settings for my iCloud mail because the incoming server is 'greyed out' and the mail app identifies this as the incoming server being blank which it isn't, but I cannot edit it as the 'greyed out' font is locked and unchangeable. Apple state that the incoming server should read as:
Server name: imap.mail.me.com
But mine reads this and it won't let me change it. Other wise the email works, but I do need to adjust the settings etc and I can't because the incoming server is apparently blank when it isn't.
Server name: p09-imap.mail.me.com
I hope this made some sense to someone. I simply wanted a new email address and it's taken up the best part of an afternoon.
Thank you.

Answer 1

Problem Solved(ish)
I had to Apple chat, iCloud is set a certain way, and that's it.
They edited my full name FOR ME (I know).
Password is made to match your Apple ID, so that's how to change that.
As for Mailbox behaviours, as I said above - On the left side bar of Mail app, right click or Command Click under Mailboxes iCloud.com and select Get Account Info then> Mailbox Behaviours. Your settings will save then without the whole 'Can't save settings when incoming server is blank.'
I hope Apple will soon make that if they must have an auto-filled Incoming Server, that the Mail app will not recognise it as blank so that we can at least edit Mail preferences when and how we like it.
Thanks.