I'm a relative newbie, 70 yrs old. Lifelong runner, but arthritis put a stop to that. Now trying to improve swim technique. I have a waterproof camera so I had someone else shoot me for a lap so I could see what I was doing wrong. I have no kick, which I've mentioned before, but worse than that, the legs sink 1-2 feet below the surface. I look like a dying walrus. What I want to do, whether the kick provides any propulsion or not, is raise my legs toward the surface to get more streamlined. What needs to be done???