Here's a Festival to consider. Northern Indiana Bluegrass Assoc. Festival over Labor Day Weekend at the Fairgrounds in Kendallville, Indiana. On Saturday morning they have several workshops including one called Jam Etiquette for Beginners (or something like that). It is run by a couple friends of mine that are old-hands at festivals and BG music and they will answer all your questions. Also a lot of groups picking in the camping area, most are open to other pickers. Some groups playing will be the paid performers rehearsing and warming up, you'll soon learn if they don't want visitors playing along. Camping is available. You can get more info by going to Google and putting in: Northern Indiana Bluegrass Association. Maybe see you there.