If you want to pull two or three people, I suggest you buy 3 meters or 3.3 meters. As for horsepower, I think 20hp will do. Whether you can swim or not, you must wear a life jacket. This is common sense. Life is irreversible.
It's no problem to be 5 kilometers from the seaside, but pay attention to the weather and water conditions. Try to avoid sailing in big winds and waves and avoid waters with more reefs. Don't drive the highway if you are not familiar with the waters. After all, it is made of rubber.
As far as I know, some factories in northern China adopt imported Korean materials and cold pressing technology, all of which are hand-made. The whole ship is composed of several air chambers with good air tightness.
In any case, the safety of the ship is the most important. Good materials, good technology and correct use.
I also like to play with boats, which is more interesting than cars.