I've done quite a bit of research on the topic. Most people recommend you start with a salumi - it's a cured meat made from a whole muscle. Think prosciutto or bresaola. It tends to be easier and safer for first timers because you don't grind the meat and expose surface bacteria into the middle of the salami or sausage.
You can rig up a small wooden box w/ a computer fan and a bowl of water to control humidity. The key is keeping humidity high at the beginning, and gradually reducing humidity so it is never too much lower than the meat that curing. If the initial air humidity is too low, the outer layer will dry out to fast and form a case that traps moisture and can lead to the piece rotting from within.
I have designs on a future temperature and humidity controlled environment to take up this hobby. For now, ham and bacon are simpler and turn out great.