The water volume isnt necessary at all, it just creates a resistance against the water. You will need to learn how to add the buoyancy from the example with the meshes, boat, etc. and setting the points accordingly, unfortunetely I didn’t it myself, so I can’t guide you through . There is an excellent set of swim animations in the marketplace for a fair price in my opinion, you should take a look. You will need to get used to deal with blueprint animations to make it right, but Im sure will worth the effort.