The following video is a good starting point to familiarize yourself on how to use key shortcuts and interface. It also covers the preparation of unit system to millimeters and adjusting grounding plane grid size for 3D printing. All shortcuts are available at the following post.
Much better project and recent one, covering 3D print process in Blender.
Use the following Blender template for setting the 3D environment for your project. Adjust the printing area according to your volume size.
Download Blender 3D Print Template
The following video presents setting print area, start blender with printer template.
Refer to Blender - Install Mesh 3D-Print Toolbox page in order to view 3D Print tab in Blender.
Other Tutorials
youtube 3D print city scapes via Blender.