Try this page. Darth Cephalus' single hand saber tutorials really helped me. If you have any questions, feel free to ask
and if you get impatient, you can start going through some forms and katas(you would have to look them up) using a yardstick.
If you wanna learn stage combat stuff, look up basic stage combat sword positions on youtube.
If you wanna duel, go over to the saber fighting forum on this set of forums and the have resources there as well.
If you wanna learn choreography, wait until you have your stage combat positions down pat and have another person to practice with.