thanks so far for all the helpful comments. I'll skip the helmsman course. As said, I did some sailing vacations in the Netherlands (beiing the skipper). Also, in my younger years I worked on a 360 ft Rhine barge, being at the helm many times. Meanwhile I prepare myself by reading all about narrowboats and watch lots of videos on YT. As you might have noticed, I tend to be on the responsible side so I don't expect to much trouble. For now, the Oxford canal looks like a good place to start....