Following these steps will allow your environment to be provisioned on time.

Step 1 – Before SAP Customer Data Cloud can be used, the IT Contact mentioned in the contract receives a Welcome E-Mail. This e-mail is sent within 3 days following the contract start date and contains key getting-started information and links.
Step 2 - Login into SAP for Me and start the provisioning process of your new SAP Customer Data Cloud solution.
Step 3 - After logging in, add more users before performing other tasks.
By default, you are entitled to one production tenant, unless otherwise stated in your contract. You can use sites to split the environments (DEV, STG, PRD).
