Hi Dana,
Go with an epoxy board to start with. The DB board I posted is a very cool board, but I would not recommend it as a starter skim for kiting. After testing dozens of skims I can tell you that for most uses you should find one with these approximate dimensions:
50" - 54" in length and 19.5" - 21" in width.
I have also found that the more traditional outlines with the wide point further back, not an egg shape work better. Start with a board around the dimensions I gave you will be fine. Volume does not matter as much as you might think, and width actually plays a much larger role in how the board will perform. Most skims around the size I listed will be about 3/4" thick throughout the majority of the board. If you want me to get more techie we can talk about rockers too.
Also, unless you really like wax, I would recommend at least a tail kick-pad. Like I said before, check out used surf shops and I bet you will find a nice used skim for around $200 from Victoria or ZAP and you will be good to go. If you can't find anything or are having a hard time shoot me an email and I will help you find something.
Let me know how else I can help you.