Read reviews for the Sport Caster 12.5 by Perception as submitted by your fellow paddlers. All of the reviews are created and written by paddlers like you, so be sure to submit your own review and be part of the community!
Bottom line, I like it. It is very stable. Very forgiving. For a beginner those are 2 very important things. I was on a river with a pretty good current and going upstream was surprisingly easy. I did it several times just messing around learning the kayak and how to paddle. I am looking forward to getting out more often. Keep in mind, though, with a sit-on-top kayak, you are not going to stay completely dry. Simply paddling will get a little water on your feet. But it is very easy to get in and out of. I'm 56 years old, 5'10" and 160 pounds. This works well for me. Might even do some fishing out of it this summer.