Hey,
Once your Bungie name is created, you will not be able to change it until that feature is added later regardless of platform (In the TWAB they mentioned they were aiming for winter to release the feature).
Your Bungie name will be created by taking the display name of the first platform you log in with once season 15 begins, so yes, you should be able to log in on PC and then go back to console. However, if you're using Steam, remember that you will not be able to use any of the unique characters available on the platform in your Bungie name, only those that appear on virtual keyboards on console.
English
-
Thanks for the help 👌