The shots look great, Jessica, the exposure looks right on. Color may be a little dark, but most likely because of the expired film. There is no setting for the aperture, just for ISO, if you want to force a faster aperture, use slow film or an ND filter. Fuji Reala 100 works very nice in this camera, and I wouldn't hesitate to use slide film with it. As far as anything else, press the shutter half way for focus, hold it to lock focus, then push it all the way. That's really all there is too it.
I do have a manual here somewhere, I can mail it to you if you really think that you need it.