Nice lookin' camera. Don't know much about the Yashicas, but I have a few manual 35mm SLRs and love them (to the extent that my DSLR sees almost no action these days).
As far as film goes, I think the big question is black and white or color. For me, shooting color in most situations seems like a waste, since I can shoot digital color and generally get better and more tweakable results at a considerably lower cost. For color, you have plenty of film options in all speeds, and can get developing and printing done at the local grocery or drugstore.
Black and white, however, is a whole different animal. This is 95% of my film work, and I love it. Almost no stores develop black and white anymore, at least compared to color, so you will want to learn to develop it yourself. This is not nearly as intimidating as it sounds- everything you need to get started can be had for about $50, and your running costs will be much lower. This will get you set up to develop to negatives, which can be printed at the grocery or drug store, scanned at many locations (or by you if you have or get a film scanner, which is not as expensive as it sounds), or print them in a darkroom. To set up your own darkroom to do analog prints, you'll need more experience and equipment, but this is doable too. For me, the best compromise is developing my film, then scanning it (my apartment is not big enough for print darkroom equipment). If you're interested in homemade black and white, there is plenty of information available, an it really isn't that difficult.
As for film, I found 400 ISO film to be a good general-use starter film. You have many options in black and white- Kodak Tri-X and Ilford HP5+ are more "vintage" style, while Fuji Neopan, Kodak T-Max, or Ilford Delta are more "modern" style, with less grain and different tonal characteristics. I can't help you much with color film- I usually shoot Fuji Superia 400 because it's cheap and available anywhere, but like I said, I don't do much color.
Most of all, I say dive in. I started shooting film this summer on a whim, and I've had more fun and learned more than I could have ever imagined.