First I can just say that I found the experiences to be completely enjoyable. I loved the music, the words we recited, and of course, the Shofar.
I didn't feel as much like a foreigner as I thought I would. For most of the services people read from the book just as I did, although there were certain times that everyone knew the words from memory.
I felt even more welcome as a guest in someone's home afterwards. Everyone was warm and welcoming.
All in all, it was my first Jewish experience, and it was great.