I'm kind of curious how the building would look outside, and I'm also curious in what time or technology-level this plays, since the Church looks kind of modern, so I'll assume it is a modern setting. Otherwise the unsupported width of the roof seems VERY large.

It does look a bit empty, and you may want to start to play a bit with light and shadow to make the map a bit more interesting if you want to keep it empty. Absence of furniture is bound to lead to emptyness...