I'm currently running an Inquiry process at the parish that is based on the Gospel According to St. Mark. I read a short passage from the Gospel, extrude some key points, and then read some selections from the Catechism of the Catholic Church (CCC) that coincide with those same key points, repeat the key points, and then open the floor for questions on the topic at hand or anything else pertaining to the Catholic Faith.
Insight 1) At this stage, select the key points (and the CCC paragraphs) entirely from the "IN BRIEF" sections of the CCC. This will help to narrow your focus in the CCC and save you a lot of preparation time. This approach will also ensure that you deliver essentials and not initiate a dialog on details that uninteresting/unimportant in the initial stages of conversion. (You can get into all the details during systematic catechesis.)
Insight 2) When you put up the slide that says Q & A has begun, be sure there are lots and lots of possible applicable questions up there in case it happens to be a slow day for questions.