The Raspberry Pi intro is 10 hours and shows you everything from how to control it with Python to adding vision to your applications using a camera module.

You have to carefully look at [upir’s] Arduino thermal camera project because it intersperses pictures of what you expect an 8×8 sensor will produce with images produced by a much better camera.

Raspberry Pi has just launched the Camera Module 3 Sensor Assembly for just $15. It's essentially the same as the Camera Module 3, but for smaller projects.