You can have success with a variety of lures - Rapalas, Thin Fins, various crank baits. Also spinners, gitzit tubes, whatever you can retrieve below the surface when you cast, you can use trolling from a kayak.
Don't try to win races when trolling, just go at a slow, leisurely pace. Initially, take a look at your lure in the water, close to the side of your kayak, to see how it's tracking and try to maintain that pace. With crank baits, you can see the rhythm and bend of the rod tip which will indicate that the lure is tracking properly when it's behind your kayak. Don't be afraid to let a lot of line out, particularly if you are trolling a shallow running lure such as a small floating Rapala.
Have your rod holder in front of you and your rod horizontal to the water, with the tip close to the water, maybe a few feet or less from touching it. It's good to have the rod on a mount in front of you so you can see it pull back when you get a strike. You will also be able to see if your lure stops tracking properly, due to weeds or whatever else may happen.
Trolling from a kayak can be very successful, because of the inherent difference between a motorized craft and a human powered one. For the most part, a motorized craft will travel at a constant speed when trolling. A human is not machine like, and will from time to time, pause and/or vary paddling speed. This will cause irregularities in the travel of your lure and can trigger a strike.
I have caught many bass when trolling in my kayak; also, pike, pickerel, pan fish and surprisingly brown trout and even more surprising lake trout. Trolling is not the primary tactic that I use; however, if I'm traveling from one place to another on the lake and am not in any hurry, I might as well have a lure in the water and give myself a chance to catch something.
Good luck with your efforts.