Shien, then. But can I have it reverse-grip?
Absolutely. The Shien Expert Specialization of the Sentinel career is the only one with the talent, Shien Technique, which allows you to use cunning instead of brawn for Lightsaber checks. Otherwise you may use the form, but it will not effect your rolls at all.
Anyway, if I decide to join this one (and I'm still undecided) then I'd probably go for something like a force adept healer/seer/mystic kind of person who is mostly a support character rather than much of a combatist. Is that viable?
Absolutely. While combat will most certainly be a thing, it will not be constant. I have had entire sessions of the one I run over voice go without combat, due to players taking the initiative and putting forth convincing reasons to not fight. To put it succinctly, if everyone focuses on making combat-centric characters, it will be a very short roleplay indeed.
I also remind you all that Jedi are not a common thing in the galaxy anymore, as most were hunted down ruthlessly by Lord Vader. The force is considered to be an old fairy-tale by most, and force users are not all that common, at least the ones who know that they are using the force.
I have also decided that I will give the whole play by post thing another try. The last time I did so did not go so well, but I place that blame on the fact that people were not required to update within a certain time frame. If at all possible, I would like to get you guys to roll your characters as soon as possible, so I can use said information to create a framework for a story. I can do this very easily through voice chat over Steam or Skype, and can answer any and all questions that way. My Steam ID is XT Vengeance, and my Skype name is xtvengeance. Feel free to contact me anytime.