Okay, I've changed my name, handle, moniker, tag, designation, label, what-have-you, from Harry65 to Harry67. And it didn't wipe out my account, unfriend my friends, take down the internet or otherwise cause undue mayhem. This name change better reflects my ever growing maturity and... oh hell, I'm getting older... okay!
Everything stayed fine when I changed mine.
The account will still exist the same, so changing your username will only be a “cosmetic” change. Others have changed their names, including @A myALZteam Member, so you will be fine and you will remain on the teams you are already on.
I don’t think it did for Lindylou, but she’s done it so she’s the gal to ask. 😉