Very Newbie...???

[flydrifter]

My name is Scott, I live in Gilbert, AZ
I have been wanting to get a kayak and fish from it for years. I have been looking at the sit on top. My wife just bought me an Ascend H10 for my birthday. It is a hybrid, so they say. I have read about it and watched videos. Everything read and watched talked about how stable this kayak is. Thoughts?
I put it in my pool... Well, I don't feel very stable, at least I didn't go for a swim. I think this might be due to I have know idea what stable is without any experience. Videos I watched on this boat show fly casting without so much as a ripple. I think I'm going to take it out on a local lake here in AZ and check it out. Any input and/or suggestions would be great. I can't wait to get started and get it all set up for me. Looking forward to posting...