Hi Rebecca. Other than what everyone else has said, just be aware that the services start very early and are never short. Most of the Ethiopian Churches I've served in start the raising of incense at 4:30 AM. Since you're not serving in the altar though, if you get there by 7:00 am (or perhaps later, if you're so inclined), you'll still be good. All told, you'll be there past noon. You'll enjoy the chanting. It's very beautiful, but there will likely be no English at all. You might want to buy a white shamma or gabi (cloth) to wear over your street clothes if you're going to be attending long term, but it's not mandatory. Oh, and you know how in the Coptic Church the men go up for Communion before the women? Well, in the Ethiopian Church, the women go up before the men. I hope you find a real spiritual home there!