This may be a little late, but I can second that Khensur Rinpoche is very kind, learned, and he does encourage completing the preliminary practices/ngondro. In fact, Land of Compassion Buddha has prostration practice every 9 am, Monday thru Friday. You can see the schedule at http://www.compassionbuddha.org
I'm not sure if you have other Gurus already, but I would suggest that you read the 50 verses on Guru Devotion
if you have not already. It is very important to be mindful of our actions around our Guru, which will translate to being mindful of our actions around all sentient beings. Our Guru is the beginning of the foundation of all good qualities.
Here is the text online http://viewonbuddhism.org/resources/50_verses_guru_devotion.html
Anyways, I rejoice you have met and found the Dharma through the meeting of qualified Gurus such as Khensur Rinpoche, and I wish you much success in your practice. Hope to see you at the center sometime!