There are different types of kayaking, fishing, recreational, sea, and expedition.
One thing they all have in common is safety gear.
Proper clothing for water immersion and sun protection are paramount.
A good PFD.
A spare paddle, you don’t want to be caught up the proverbial creek without it.
A marine radio if you are in the ocean or large lakes with a marine patrol. Also know the rules of use and how to properly use it.
Food and plenty of water. Dry clothes in a dry bag along witha first aid kit.
Above all weather forecast and know your limits.
Have fun and enjoy