P3.express is not perfectionist; it knows your limitations, and the way projects are run in the real world.
You should be able to learn and start using P3.express in a day or two.
This is how it works:
• There's a Project Flow that explains everything you need to do in 37 activities, organized in Cycles.
• Then, there are a few roles defined in the Project Team.
• And of course, you have a number of "documents" (9 elements to be precise). To make it as simple as possible, templates are available for all of them, and you even have Solution Packages that tell you how to integrate them and use with normal pieces of software, such as Microsoft Project, Excel, Google Apps, etc.