What kayak did you get? I've been kayaking for awhile and really just take it out when the weather looks good. But I love going when I do.
I would suggest getting time in the seat to get comfortable. Some are more tippy than others and it makes it harder to fish from. Check out 30MilesOut for a bunch of tips/tricks about kayak fishing. He's been posting videos for years on kayaking and general fishing tips.
Also wherever you launch from, know what the wind and current are doing. A paddle back to the car into the wind and against current is exhausting!
and checkout this forum too if you haven't already found it. They have a lot of good threads on setting up the kayak. http://texaskayakfisherman.com/