The option to create a new team is not available in teams, you will only have the option to join an existing team.
A new team can be requested via a web form. (Open this link in an InPrivate/Incognito browser session - login with @sdworx.com address)
If you are a guest-member of an SD Worx Team, with your Protime Account, before the migration, you will need to be reinvited with your SD Worx mail address, after the migration.
Please note that if you are a Guest member of another company's Team (Partner) with your Protime Account, before the migration, you will need to be re-invited with your SD Worx mail address to that team to become again “full member” again, after the migration.