Question about Outlook Express

I'm good with computers, but not great, and I would like to ask for some help.

I recently found out that Google uses my Gmail inbox to tailor my search results and I really don't like that, so I want to switch to Outlook. The problem is, since I have a Window's Phone 8 I already created an Outlook account using my Gmail address. As far as I can tell, Outlook will only read my Gmail but there is no Outlook address from which I can start sending new emails from. So, to fix this I created an Outlook account with the username that I desire but am unable to add my Gmail alias to it because it is already technically taken. I thought I had deleted my current Outlook domain name but it still hasn't come down and I can still login to it after 24 hours have passed; is that normal?

To further complicate everything, my phone and all other services that require a Microsoft account are using my Gmail/Outlook hybrid account and I'd really prefer to not delete that account and have to reassign my services to my new account (I also make use of Skydrive and am not sure how that transfer would work).

What I'd like is for my new Outlook account (which I already created with the domain name I'd like) to run everything, so that I can import all my Gmail email and then have it forward the rest as I gradually inform all of my contacts (people and companies) that I have changed addresses. Is that possible?

I have read articles telling people how to switch to Outlook from Gmail (especially because Gmail was planning on making WP8 incompatible with their servers) but that never applied to me because I had linked the accounts before the deadline (which I believe has been postponed again).