You've got the corncob and that should hold you for a while. Besides letting it rest between smokes, I wouldn't concern yourself about this one or other pipes, their shapes, how they feel between your teeth, how long your corncob will last -- none of that, Dan.
If you haven't already, read the links provided here and sprinkled at other sites that beginners should read, which are really as much as any beginner needs to know.
The rest will come to you in your pipe smoking experiences over time based you your own preferences and dislikes. You can read tobacco reviews on line, and/or ask tobacconists for suggestions, but what may sell well or get rave reviews might not be your cup of tea.
To thine own self be true. Enjoy!