i started out with installing apps, which led to touch flo 3d tweaks, which led to registry tweaks, which led to file system tweaks, which led to this thing called a pagepool, which led to flashing a custom rom, which led to using a kitchen to build my custom rom, which led to modifying the kitchen and using User Customizations, which led to provisioning xmls.... ge tthe point?
Just start. And soon enough you will be a PPC Geeker too!!!