You say stuff to a river, giving it instruction. This river is a new river so it needs you to say things, giving it instruction on what to do. Otherwise the river wouldn’t know how to behave.
While giving instruction to the river, you see a small boat coming down it. Inside the miniature boat is a raccoon (くん) captain and his raccoon crew. The raccoon captain is instructing them, “Stroke! Stroke!”
Currently there are no similar looking kanji which exist in the WaniKani learning system