Frank Gill walks us through the process of provisioning an Azure SQL Managed Instance:
Once you have created the prerequisites, you are ready to create your first Managed Instance. As of now, Managed Instance is only available in the following subscription types:
- Pay-As-You-Go
- Enterprise Agreement
- Cloud Service Provider
Information about subscription and resource limitations can be found here. I will update this with any changes.
Frank has a series of screenshots to show you the way.