You CAN'T train to be become a Jedi/Darksider, you have to be attuned to the force as of this moment. And if you are not then you can't train for anything. Presently there is only "one" way to get FS for your character and that is PLAYING THIS GAME!- Play it long enough and your character will eventually be made Force sensitive.
You are "rechecked" for it at levels 6, 11, 16, 21, 26, 31 and so on, and every time the chance increases. And if you don't feel like levelling your character to get FS then its to bad. Other then that the chance of being FS happens only upon creation of your character. And please dont' think about sunning and recreating until you are FS either as that is technically not "legal" or at least within the rules to do so.
And yes I was force sensitive once, and nothing I hated more then 200 people DM'ing me a day to be tested, knowing that not a single one most likely wouldn't be found FS. I checked around 75-80 people in the timespan I was able to do so, and only 1-2 came out as sensitives.
So accept your character as he or so is and play the game...... Please!!!
____________"What's money? A man is a success if he gets up in the morning and goes to bed at night and in between does what he wants to do."