The first thing you should do is take it out in shallow water and tip it so you learn how to get back right side up, so I have been told.
I think doing a roll in a kayak that is stable enough for fishing is quite a challenge, and is probably unnecessary. In a lake or slow-moving river, I'd just swim out. In my experience, if you tip in water deeper than your waist, it's nearly impossible to get back into a kayak that's not a sit-on-top. So I agree with PFD use when fishing, as your attention will be on things other than weight distribution. I never used a PFD when I was simply out for a paddle on a lake or slow river. About the only way to tip on a slow river is when you're about to get out of the water, as you get perpendicular to shore and current. If that happens, you should be in very shallow water. Tipping a kayak on a fairly smooth lake takes some special kind of skill if you're simply out paddling. Be mindful of water temps if you feel at all like you may tip. Even with a PFD, hypothermia could set in before you can make it to water shallow enough to walk out.
I would consider some short-finger paddling gloves. I always ended up with wet hands, which was a set-up for blisters in the thumb webbing.
If anybody is considering a tandem kayak for use within a relationship they would like to keep, don't. An ocean-type kayak that has a rudder that can be used to steer may be the only exception.