go learn in decent weather, some of the most fun you will have is in dinghys riding the edge of control. just do this in a boat you can right on your own and warm water. a few weekends of flipping a boat, then getting it back up, seeing how fast you can get across a river, flipping it some more you will get the idea.
or there is the slightly more boring method of going out on a keel boat with someone. just go out and have fun