Hi Mock,
there are lots of opportunities to make these boxes wth the bandsaw and obtaining patterns is one, or simply drawing on the timber itself with a pencil (remember to rub the marks off and not try to sand them off.) As metioned by Waka you can search for patterns and also buy patterns from some box makers, which you can then copy. Several bandsaw box books are also available that have some patterns in them and again, just search the web and you should get them on screen.
Pine is a softwood that you could use, but many box makers glue several pieces of wood together to make a suitable block to cut from. Choosing the combinations can be very rewarding, but if you dont have any timber, try and find a local saw mill and see if they have some offcuts of soft and hardwood that you could use. Most of these guys are very helpfu.
What bandsaw do you have and have you fitted a good blade to it and tuned it up. That can make a real deal of difference in the results you will get. Also, look for bandsaw box making videos and learn how it's done. We all start somewhere and the more you study, the better you should become. Ask more questions and you will get answers.
Good luck
Nice boxes Waka !