Need some...err...inspiration? Here's some example projects with CircuitPython code and wiring diagrams. They're not full-featured guides but they provide a good basis for seeing how to use Crickit!
Most of the examples use the Circuit Playground Express version of Crickit as that was the first Crickit released.
For CircuitPython based projects, the Feather Crickit should work fine as long as the project does not use Circuit Playground Express based hardware. There are a couple of differences noted in this guide for things like audio use.
Also you must choose a Feather that is compatible with CircuitPython.
For substituting one Crickit/microcontroller with another, we consider any changes should be for intermediate users - if you're a beginner, try to use the exact hardware specified for the best experience.