She also just had Kylo digging around in her head, so that probably gave her a pretty good idea of how the use the Force to effect peoples' minds.
As for the training, I could see it being one of those things where at least some of it is working to enhance abilities that are already there. The abilities are already there naturally, and the training just allows the Jedi to use them to their full potential.
As for the training, I could see it being one of those things where at least some of it is working to enhance abilities that are already there. The abilities are already there naturally, and the training just allows the Jedi to use them to their full potential.