If you're not sure what username to go with and ask others, you aren't stupid.
If you're going to ask anyone in the Mildly Small Memer Group what username to go with, you aren't stupid.
But if you're going to go with a username that you hate and say that "it will become personal" when you decided to change your username into something that you hate... You're a dumbass.
I know that you were somehow unaware of alts, but... Why change your username to that if you don't like it?