I dont know a lot and I am learning but like you I have been looking for a cheap alternative to experiment. I was given some infor on lighting and setup the cheap way and I have put it on my website site below, look under "Stock Photos elearning".
http://www.freewebs.com/mygardenofeden/
Have not got it yet, but I have decided to just go to local store and get the table lamps and lights and experiment as suggested by many people. Its a cheap option to experiment. They suggest doing that and then when you are better, to go for the better lighting eg Alien Bees.
Cheers
Peiling