[member="Yuuthayn Di'cantos"],
I would suggest you train with [member="Siobhan Kerrigan"] and here's why,
While she is a Dark Sided character currently (Being a Dark Jedi) she also does duty when fighting the Dark Side, the One Sith, and operates in circles with both Light Sided Characters, like HK, [member="Coryth Elaris"], [member="Phylis Alince"], and Dark Sided Characters like [member="Mirien Valdier"] or [member="Naamah Aesham"],
That way as your character trains with her and is shaped you would be exposed both to Light and the Dark, so when you will choose a side or decide to remain in between your choice will be more natural as you would have seen and experienced both of those sides working together without being at each other's throat too much. Plus they're great writers and one of my closest friends so I know they'll train you well.