To find your pathfinder window, go to window > pathfinder.
To create an almond shape, use your pen tool by clicking “P” on your keyboard and deleting the anchor point on the ellipse. Note: also convert the anchor point of the ellipse’s left side to a corner.
You now have a sleeping crescent moon created using Adobe Illustrator. Add other details such as a sky, stars or clouds such as in this picture.
