Any experiences using CFDs to trade CL with smaller contract sizes

Does anybody have experiences or opinions on using CFDs to trade CL? I’m a beginner and I will get too nervous trading 100$ trades on the future.

I was thinking about opening a Ninjatrader account, you can see some information about their contracts @ http://www.fxcm.com/uk/markets/cfds/oil/

Thanks for your feedback,

Johannes