not everyone sticks to land im out on the water either in my kayak or my boat most days every week.
i use mine alot. probably take it out 3 or 4 days a week. I actually take it on my boat(27' pro line) then drop anchor close to the mangroves and then jump on the kayak to get into the mangroves where my boat cant get to for some good flats fishing.
have two one is a single seater cobra fishing kayak then the other is just a standard 2 person cobra kayak. When i buy mine i always get better backs, seats, and lightweight paddles because all the accessories that come with the kayaks suck.
To be honest lessons aren't needed just go out in calm waters and get used to how it handles leans and getting off and back on the kayak.
ive actually gotten pretty good at standing up on the two seater and being able to either cast my rod or throw a 6' cast net without falling.