Start by learning another instrument such as the piano.
Buy tubular bells from an instrument shop or online from sites such as eBay.
Look for tubular bell teachers in the phone book or online. Often these bells are part of the school department orchestras.
Go to Mike Oldfield's site and learn to play the tubular bells in three basic lessons.
Find music that you like and experiment by playing along with it. Since the tubular bells are organized like a piano keyboard, you can learn to play "by ear" in the same manner as playing another instrument.
Experiment with the damper pedals attached to the tubular bells. These affect the sound by muting the tine after the bells have been struck.