Yes, I think until you are very comfortable with the bike and the pedals, you should come to a complete stop whenever it's required by law. As you gain more confidence riding very slowly while you're looking someplace other than where you're going (i.e., very far down both sides of the intersecting road), then you'll want to roll through the stops. But for now, don't even think about it and don't worry about what the other people in your group are doing.

Indecision will get you every time. That's how I fell in the middle of a busy intersection last month "Are we going?" "Are we stopping?" Too much attention to what the rest of my group was doing (especially the one guy who will just ride through any freakin' thing), and not enough commitment to my original decision to stop, and in the process neglecting to downshift, and a steeply crowned road, and next thing I'm lying on my side with cars hauling it down from 45-50 mph including a cop from whom I got a well deserved lecture and luckily not a ticket