Try a backstroke first

Similar to a flutter kick with a minor change, float flat on your back, and do a flutter kick with your legs. With your arms, do the "crawl" motion, lifting one arm straight into the air and keeping it straight as it re-enters the water next to your head. Once it's underwater, bend it to bring it back to a straight position next to your side, and repeat. Alternate arms as you swim, and try to keep your fingers together and your hands as flat as possible.