PLEASE HELP! I am about to get my xbox one and DAI game of the year edition in the mail and I may ha

Okay I wanted a new feel for my xbox one so I changed the name on my gamertag. It's the same one just a changed name. However I don't now if it will work on my EA account or link to it if it is a different name. I don't care about online gaming but I do care about DLC and dragons keep. Please can someone help me. I don't want to make a brand new gamer tag and have to go through the whole thing again.

I need to know if I messed it up. Also I revoked acess to my xbox one account so will I be able to bring it back just by signing in.