First Boat Recommendations
If the thought of months of work to complete a model is beyond what you are prepared to do, then, a RTR, ready to run is probably the best course to take. There are a number of excellent yachts on the market if you would consider sailing, the Dragonforce65 is a good example. They are readily available from a number of firms and vary in price as to whether you want a transmitter to be included. I have two myself. As far as RTR power boats, there are umpteen on offer, mainly of the go faster variety, but also some more sedate, like tugs or motor cruisers. However many of these are basically toys, so you need to be a bit careful when making your choice.
Cheers, Nerys