If A Ship is strong, the ocean's tides do not bother it

Practice. When you go out, and it’s lumpy, take some time to drive the boat both uphill (into the wind and waves) and downhill (away from the wind and waves). Learn what make the boat feel and respond best under current conditions. You check the weather, then look out the harbor entrance. If you see other boats of your type in the vicinity, go out and play. Practice going into the wind, downwind, into the waves and away from them.