Once you've created your custom Agent Homepage by adding the Queues you want displayed, you can now use the Add Users/Teams functionality to assign this new Agent Homepage to a User, group of Users or Team/Teams.

Simply choose the User or Team from the Type dropdown and then the Name in the second field to assign them this Agent Homepage.

Edit a Dashboard

You can see from the screenshot above that you can edit the Agent Homepage (although not the default one) using the pencil edit button at the far right. You can rename the Agent Homepage or change who it applies to.