If this is your first Wild Gears Gear Set you should start with the Compact Gear Set or the Full Page Gear Set. Each of those gear sets are designed to be a starter stand alone gear set. All the other gear sets are designed to be used with one or both of the Compact or Full Page Gear Sets.
The Compact Gear Set pairs very well with the Hoops Gear Set as a highly recommended starting point.
Popularly added to the Full Page Gear Set is the Strange Shapes Gear Set, the Enormous Hoops Gear Set, or the Plentiful Gear Set.