The symphony season is about to be underway, and here is a link to the schedule: http://dmsymphony.org/orchestra/concerts-and-events/.
One event I haven’t told you about is the family concert, which is not listed on the schedule, and it will take place on October 29th. Ticket info can be found here: https://www.desmoinesperformingarts.org/events/wellmark-family-series/633-phantoms-of-the-orchestra/. That and the Harry Potter in February are through the Des Moines Performing Arts organization. I will keep you informed about possible open rehearsals.