Listen to as many recordings of as many styles of playing as you possibly can. Type "Homespun Tapes" into a search engine and find an instruction video or book that teaches the style (there are several) you've chosen to play. Try "old time banjo" or Bluegrass banjo" in a search. This will bring more resources than you'll care to see. A lot of time can be wasted in going down the wrong road so listen to a lot of music before you buy a banjo and before you spend time learning. Let us know how it turns out.

Chip A.