I started with the SS, as the pads themselves tend to need to be reinked sooner than darker colors? But, as far as reinker techniques go, whichever color family you are most drawn to anyway, when stamping, would probably be good to start with.
Also, I cann't tell if you are a demonstrator, but if so, you might join the SU! Demonstrator Forums here--they are a wonderful resource, lots of networking, etc.
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HTH, and welcome to SCS! There's a LOT to explore! :grin: