Welcome, @Cynthea_Kimmelman-De,
See my recent reply to a related question here:
I think you’d want to great your new account as you mention so you have your new workspace.
I think you’d want to use Ditto (or Altosio) not CSV. To do so, I think you’ll need to add your new account to the org’s projects so you you can reach them as a source, and your new workspace as a destination for the transfer.
You may want to confirm with Asana Support to be 100% sure: Create a support ticket: see How to contact our Support Team.
Thanks,
Larry