You are very lucky to be blessed with a theater. My advice to you is go nuts. Once you learn all the ins and outs of what you can do with the tech in that theater, if your church ever decided to build a facility, you'll want to incorporate EVERY thing that you saw.
Fly wheel, catwalks, lighting, etc... You might want to get in touch with someone before adjusting all that stuff, of course. My wife was the theater manager at a local high school and the church that came in there on Sundays was notable for messing things up.
But, done right you will love what you can do with a theater.