First, launch off on your back with your hands by your sides and then relax and lengthen the back of your neck so that the head rests gently on the water.
Breathe in from the mouth never the nose so as not get chlorinated water up your nose which can be very unpleasant.
Many novice crawl swimmers as they are uncomfortable with breathing in during the crawl swim too many strokes and as a result are desperate to breathe in by and therefore can’t help gasping. This often leads to swallowing water or getting it up the nose.
Experiment with softly RELEASING the feet into the frog position and turning the feet out.
After placing the arm in the water and extending it, release your forearm, bend your wrist and elbow gently, then apply effort.
Explore what Steven Shaw calls the first principle – which is that your alignment affects your performance more than any other factor.