Does anyone know how to change your google username? I have been trying for hours and all the instructions on the internet do not work. Plz help!

Does it involve YouTube? If so tell me about it.

I tried that a while ago & unfortunately it won't let you. I had to just make a new account. This was about 2 months, so they might have made it possible by now, but when I tried, it wasn't possible.
I know that's probably not what you wanted to hear, sorry! But if they did make it possible & you figure it out, will you please let me know?
Brittany