Vienna's church concerts beat any concert hall for a first-timer: the baroque stone, candlelight, and a chamber ensemble close enough to watch the bow arm are the whole point.
Our pick
At St. Peter's, a few dozen seats wrap around a small ensemble inside one of Vienna's most ornate baroque interiors, so you are not watching from a distance but sitting inside the music. The program runs Mozart and Vivaldi at a pace that holds even if you have never been to a classical concert before, and the whole thing wraps in under ninety minutes, which is the right length.
If our pick doesn't fit
Similar program and church atmosphere at a considerably lower price, with solid ratings from a good number of reviewers.
A longer Austrian program in a more formal setting, though it costs noticeably more than the main pick.