Start again at scanning power. These cells are large and move very, very slowly. So slowly, in fact, that you have to observe for a while to detect motion. The best tip is to cut down the light and scan the droplet quickly. Look for irregular shapes, with a smooth but crisp outline.
Healthy cells are colorless.
If not, make another slide. Examine slides made by your instructor or other students who have found an Amoeba . These cells are large, have color and move quite rapidly. The motion is quite distinct, with the cells turning in a manner to a football thrown as a spiral. The cells often change direction, almost reversing and quite abruptly.