Rent a few so you can assess how easy they are to shoot and work the controls. Revolvers are fine, but keep in mind recoil can hamper a repeat shot and reloading will take practice. I sold my Ruger for those reasons.
Also you MUST have a strong flashlight to identify your target. An elderly gentleman shot his wife by accident one night not realizing she got up to get a drink of water. He just saw a dark figure in the doorway of his room.