There is a new (re-released) course on the openedx.microsoft.com site where you can sign up and start learn about Azure Stack and also from the 30th of March do labs to enhance the learning experience! This lab environment is an awesome opportunity if you do not have access to a multinode or devkit setup and want hands on experience!

Extract from the site:

You will work your way through the online labs to become familiar with:

• The components and architecture of Microsoft Azure Stack
• Deploying Microsoft Azure Stack
• DevOps using Microsoft Azure Stack
• Resources in Microsoft Azure Stack
• Managing IaaS in Microsoft Azure Stack
• Managing PaaS in Microsoft Azure Stack
• Managing updates in Microsoft Azure Stack
• Performing monitoring and troubleshooting in Microsoft Azure Stack
• Understanding how licensing and billing works in Microsoft Azure Stack

Labs included are (online labs will be available on 3/30/18)

• Connecting to Microsoft Azure Stack using Azure PowerShell
• Configuring Delegation Using the Azure Stack Administrator Portal
• Registering Azure Stack with an Azure Subscription using Azure PowerShell
• Add a Windows Server 2016 Image to Azure Stack using Azure PowerShell (Disconnected Scenario)
• Add a Windows Server 2016 Image to Azure Stack (Connected Scenario)
• Add a Linux Image to Azure Stack using Azure PowerShell (Disconnected Scenario)
• Validating ARM Templates with Azure Stack

Each lab includes the following:

• Detailed procedures for individual lab tasks
• Access to a Windows Server 2016 Domain Controller for performing hands-on lab exercises hosted on Microsoft Labs Online (MLO)
• Access to Azure Stack Admin and Tenant portals
• Short “how-to” videos for viewing each task should you get stuck and need to see how it’s done

You can find the course here and read more about it: https://openedx.microsoft.com/courses/course-v1:Microsoft+INF240x+2018_T2/about