Even the most experienced paddlers get into troubles from time to time. To prevent unpleasant consequence it is vital to have proper safety equipment at hand and to know how to use it.
HIKO provides safety equipment of high quality and suggests you should practice lifesaving in white water in advance.
Attend a kayak school or organize a course lead by more experienced friends but learn at least a bit how to rescue and get rescued! Bad memories of a situation when you were not able to help a friend of yours could haunt you till the end of your life.