Thanks for all your replies people. I was planning to do an introductory course of some sort but thought I could get some basics from a book. I need to know about types of boat, registering a boat, where I can use it and lots more. The house is near Littleport on the River Great Ouse. I know this is not the Norfolk Broads although I still remain a fan of the Broads. There are a few options for exploring the river around here, especially to the south towards Cambridge, Bedford, St Ives etc. so maybe a river cruiser later.
Thanks again for advice.
Malc.