Your lopping your legs off not going with a digital slr. Not because digital is better, but because it is easier.You are looking to improve your skills and quickly. Well let me assure you that purchasing a new dSLR is the best way to.
I took 2 years of photography in high school and was using my mothers 30+ old slr. After two years of messing around in the dark room, working the different types of film as best I could, and only knowing what was good and bad days later I came out with very little appreciation for photography.
The most agrevious setback was film. Dropping loads of money roll after roll for top notch film was just ridiculous.
With a digital slr you can effectively throw the entire dark room away, along with the film and repalace it with a few hours in front of the computer like your doing now
Rather than being to limited to 24-32 shots max You can easily shoot off 200-300 in a day. With each shot you can preview what you just shot and adjust exposure, white balance, f-stops whatever you want.
Get yourself a copy of Photoshop and start to learn raw format. Basically shooting in raw is like shooting film but instead of wasting time in a dark room and chemical mixing and manual old-fashioned photochopping, your on your ass in a comfortable chair sipping coffee and slaving over your work.
I dropped photography after the first 2 years. It was just way to much for me to keep up with. But In the past 1.5 years I got the digital bug and my desire to photograph came back. Everything I have learned and been able to produce since then has far suprassed everything I ever learned in my photography classes.
If you want to learn photography go digital.
If you want to struggle and despise photography (As i did) keep using film...