Choosing packages following apprenticeship should follow the usual five year / three year pattern outlined in Grogs – unlike Gifted Hermetic magi, Redcaps are treated as companions thereafter in character creation and gain only 15 XP per year to spend on Abilities.
The new Messenger package is suitable for all Redcaps that deliver messages in the course of their normal duties but the Hermetic Politician and Artist Training Packages from “Training Packages for Magi” may be appropriate for Redcap characters with a compatible role.
My Life as a Grog 