As soon as Windows Server 2012 went into General Availability MVA released a fair amount of videos to cover the new functionalities. So watch and learn for free:

Windows Server 2012: Technical Overview

Server Virtualization Module

• Microsoft Virtual Academy: Windows Server 2012 Server Virtualization Part 1
• Microsoft Virtual Academy: Windows Server 2012 Server Virtualization Part 2
• Microsoft Virtual Academy: Windows Server 2012 Server Virtualization Part 3
• Microsoft Virtual Academy: Windows Server 2012 Server Virtualization Part 4
• Microsoft Virtual Academy: Windows Server 2012 Server Virtualization Part 5
• Microsoft Virtual Academy: Windows Server 2012 Server Virtualization Part 6

Networking Module

• Microsoft Virtual Academy: Windows Server 2012 Networking Part 1
• Microsoft Virtual Academy: Windows Server 2012 Networking Part 2
• Microsoft Virtual Academy: Windows Server 2012 Networking Part 3
• Microsoft Virtual Academy: Windows Server 2012 Networking Part 4
• Microsoft Virtual Academy: Windows Server 2012 Networking Part 5
• Microsoft Virtual Academy: Windows Server 2012 Networking Part 6

Storage Module

• Microsoft Virtual Academy: Windows Server 2012 Storage Part 1
• Microsoft Virtual Academy: Windows Server 2012 Storage Part 2
• Microsoft Virtual Academy: Windows Server 2012 Storage Part 3
• Microsoft Virtual Academy: Windows Server 2012 Storage Part 4

Identity and Access Module

• Microsoft Virtual Academy: Windows Server 2012 Identity and Access Part 1
• Microsoft Virtual Academy: Windows Server 2012 Identity and Access Part 2

Virtual Desktop Infrastructure Module

• Microsoft Virtual Academy: Windows Server 2012 Virtual Desktop Infrastructure Part 1
• Microsoft Virtual Academy: Windows Server 2012 Virtual Desktop Infrastructure Part 2
• Microsoft Virtual Academy: Windows Server 2012 Virtual Desktop Infrastructure Part 3

Web and Application Platform Module

• Microsoft Virtual Academy: Windows Server 2012 Web Application and Platform Part 1
• Microsoft Virtual Academy: Windows Server 2012 Web Application and Platform Part 2
• Microsoft Virtual Academy: Windows Server 2012 Web Application and Platform Part 3

Windows Server 2012: Server Virtualization

Virtual Machine and Scale Mobility Module

• Microsoft Virtual Academy: Live Migration of Virtual Machines with Nothing Shared
• Microsoft Virtual Academy: Live Migration of Virtual Machines using SMB File Share to store Virtual Machine Files
• Microsoft Virtual Academy: Live Migration between Clusters
• Microsoft Virtual Academy: Storage Migration
• Microsoft Virtual Academy: Importing a VM

Windows Server 2012: Storage

Storage Spaces Module

• Microsoft Virtual Academy: End to End Management

SMB 3.0 Module

• Microsoft Virtual Academy: SMB 3. 0 High Performance Storage with Transparent Failover

Cluster Shared Volumes (CSV) and Cluster-Aware Updating Module
• Microsoft Virtual Academy: Setting up Clustered Shared Volumes
• Microsoft Virtual Academy: Add disk to CSV in Windows Server 2012
• Microsoft Virtual Academy: BitLocker on Cluster Share Volumes
• Microsoft Virtual Academy: Add Storage Space to Cluster Share Volumes
• Microsoft Virtual Academy: Node Drain

File System Enhancements Module

• Microsoft Virtual Academy: Managing Data Deduplication

Windows Server 2012: Networking

Managing Network Infrastructure Module

• Microsoft Virtual Academy: NIC Teaming in Windows Server 2012

IP Address Management (IPAM) Module

• Microsoft Virtual Academy: IP Address Management in Windows Server 2012

Hyper-V Network Virtualization Module

• Microsoft Virtual Academy: Hyper-V Network Virtualization

Windows Server 2012: Management & Automation

Standard Based Management with Windows Management Framework Module

• Microsoft Virtual Academy: Standards Based Management
• Microsoft Virtual Academy: Simple and Easy to Automate
• Microsoft Virtual Academy: Multi-Machine Server Management
• Microsoft Virtual Academy: Local Server Experience and Deployment Options

Multi-Server Management with Server Manager Module

• Microsoft Virtual Academy: Deep Dive into Core Functionalities
• Microsoft Virtual Academy: Deep Dive into Server Manager – Advanced Deployment
• Microsoft Virtual Academy: Personalizing Your Experience with Server Manager

You can also logon to MVA and find the track there.