Heylady, in terms of demeanor during the service, I think we have more in common with “old time Fundamental Baptists” than with many contemporaries of my own faith. I have heard of far worse occurring during Mass than applause for a wonderful (and reverent) hymn, so maybe I will “cut them some slack” as the other poster suggested. But it really shouldn’t occur during Holy Communion. BTW, our kids attend Vacation Bible School at a Southern Baptist congregation (not sure if it is exactly the same background as you but they are very nice people and reverent).
Are you familiar with Jeff Cavin's courses for Catholic Bible study? I went through the Timeline class, and it was quite good: