Hi, I'm somewhat new to 16mm myself but I've shot in Super 8 and Standard for close to 10 years now. From what I know about 16mm I'd say the easiest thing to do would be to just pick up a $10-$30 16mm camera on ebay to get a feel for it. The most it's going to have is a crank, paralax view (usually), film meter, light meter. From my experience with shopping for 16mm if you want sound or a motorized camera you really have to go professional. Super 8 seems to offer a lot more variety for amateurs, you can get a throw away camera on Super 8 that still is sound, 16mm seems to be mostly dedicated to the professional demographic. And as far as the Krasnogorks-3 goes, I have never handeled one of those so can't help ya there.
Regards,
Ernie Zahn
Bonnut Film Studio