Why not try and apply and see it not approved than not trying at all. If I can remember correctly, people that asked theymos to change their name, theymos changed it last year December for many of them.
I'm aware that a lot of members have changed their names here on the forum, and some more than once's a member like Cryptovator; if not up to three times now, they all got approved.
When I said it wouldn't be approved, I was referring to the OP, not even giving him high hopes. This is because many people have complained that their request was not fulfilled and their name was not able to be changed. These people were newbies and others who had not yet built a reputation on the forum. Secondly, they did not give a tangible reason for why the name needed to be changed.
I doubt an account that has zero merit and a newbie rank will be in a hurry to ask for a name change, and I don't see it standing any chance of getting that request approved. That's why I never give the OP high hopes of applying; creating another account with the OP's desired username is just the best option I can see for the Op; there is no harm in trying, so he can still give it a try too and see what comes out of the result.