All you need is a film slitter to slice the film down to 110 size. Easy, cheap, and quick to make. See my Instamatic Film Slitter Instructable.
110 film is hard to get except from The Frugal Photographer. This is a great source for other hard to find film as well.
Most photo lab chains can develop, but not print, 110 film for under $2 USD a roll.
Or for developing and prints, you can use York Photo for about $4 USD a roll.
Submini cameras need to be very steady. You will get sharper photos if you prop the camera against a wall, tree, or car, or use a pocket tripod if the camera has tripod socket.
Step 1: Unload the 110 cartridge
Place the 110 cartridge on a table in subdued light.
The winding gear on the cartridge should be up, and the label side should be away from you.
Use an X-acto knife or utility knife to carefully and shallowly cut along the semi-circular edges of the 110 cartridge.
You can now pull the cartridge gently apart.