As Jim said, if your water is really hard you should use distilled water for mixing chemicals and final rinse. The minerals will leave deposits on your film, and a filter only removes particles, not dissolved minerals. One of the easiest developers to use (IMHO) is Ilfosol III. It is a liquid, and you mix just what you will use and discard this mix after use. After that you need a fixer - for film I use one with a hardener. And then a hypo clearing agent and a PhotoFlo.
I would wait until you get some experience with B&W before trying color. Color is much more critical of time and temperature than B&W. Then, of course, you will need and enlarger, print washer, etc. to get the most out of your efforts.
Let us see your first films, and good luck.