Umm... there really is no grind. You can play whatever you want, however the hell you want. Any grind you face is pretty much self-inflicted. You don't need that 306 gear. You don't need that... umm... what else do you grind for? Credits? To do what? You don't need space barbie.
You have 8 classes and 3 class disciplines each, with dark, light and neutral sides, expanded even further into Empire/Republic/Alliance factions. Your gear will come as you play. Don't grind, play.