not only could, you should. you will not really learn photography with automatic digital cameras. you have to learn about film speeds, exposure times, depth of field, light fields etc etc etc. Once you've learnt all that, the hard way, then you can go digital and let it do it for you. I still lug my SLR with multiple lenses and several rolls of film around and the results are still far superior to anything I get out of my digital.
i was looking at some holiday shots the other day, comparing the same subjects and scenes shot digitally and shot chemically - the digitals are snaps, the film is excellent, far clearer, truer colour, more depth. that's because film is more malleable as a medium at point of exposure whereas digital is designed for post-edit.
call me a luddite but much as i like my digital it will never replace my SLR for quality. and its not that good an SLR, it's only a Yashica FX-3.