Affiliate Marketing Secrets

Hi guys, so i own a gaming channel on youtube, and i recently wanted to expand a little and create a secondary channel affiliated with the channel mentioned above. When i clicked on ‘create account’ in youtube, it takes me to the google accounts page. (incredibly annoying how you need a google account). And tells me i need to create an account and go through everything necessary to ‘make’ the account. After doing so it redirects me to youtube and says it has connected me with my google account.. This is all fine and well, except for the small problem my channel name is my real life name.. And there’s no clear way to change it.. Does anybody know of a way to change my username? for example i would like it to be ‘(channelname)news’ yet the only way i can see of possibly having that is through google accounts ‘nickname’ which is incredibly stupid as it would then be ‘first name (nickname) last name’ which is not helpful at all.
Anybodies help would be incredibly good as quite frankly its pissing me off. I much preferred it when you didn’t have to go through google.