The film lever is not a big problem,a spring may have become un attached,but you could easily use the camera as you do, your big problem is the shutter curtains, they should connect and the film will be exposed to light all the time the curtains are like they are, in the U.K. I would suggest a camera repairer,but can't where you are, but if you want to use the camera it will need a trip to a repair shop, but I think they are plentiful and reasonably cheap, so if you want a Zenit I would look for another, possibly a later model, or if you have a collection of 45 thread lenses then a pracktica or old pentax spotmatic may be a better prospect,Hope this helps,Richard