Like most other sports one does, this requires some training and some knowledge of safety equipment. I received some knowledge in boys scout camp (there is a major difference between kayaking and canoeing but the principles are there) and some time on a lake that was presented by L. L. Bean. We went on a lake and learned some of the basics.  Here are some YOU TUBE videos on safety

This is funny but can happen without training

This is suggested clothing to wear