It's been a long time since I have rowed a boat. The one thing I remember is get the right length of oar. The length from socket to the handle. I didn't like an overlap on the handle. If you would have to hold one handle higher than the other to get equal stroke timing the oar with the higher handle would be a little deeper in the water. This would give the tendency to row in a circle if you didn't compensate. In a perfect world the oars would enter the water at the same time, the paddle ends would be the same depth and angle to the water. The stroke length would be the same. Fortunately we live in an imperfect world, where you have current and wind to deal with.
Also sometimes the oar lock would squeak when rowing. Then then the entire boat amplified the noise and scared the fish away. So I would suggest a little grease in the sockets and a small bottle of grease to keep on board for emergency use.
Good paddling !!!