If you want multiple field of view you can get a zoom instead e.g. the Panasonic 14-140 II. What you won't get from a zoom is a lot of depth of field or enough light gathering to take great photos inside without flash.
A fixed focal length prime lens like this, you zoom with your feet or you compose with what you've got. This lens is good indoors in a large room or assembly, gym etc. Not across the table. For that, I say get the 20mm Panasonic.
It's a matter of choices.
Whatever's the case don't be intimidated by brand new prices. Buying very affordable used lenses is one of the great benefits of going with micro four thirds.