Beginning with skating forward, skate down the ice with your arms going back and forth (don’t let your hands drop, have your hands 90degrees from your elbows), not out to the side, your elbows should be swinging back and forth (if your left leg is fully extended, your right elbow should be swinging backwards). Each time you push off the ice with your leg, it should be fully extended and pushing to the side (not backwards) while the other knee is bent. You want the push to come from your knee.
The stride push is always directly to the side and then recover the foot the same direction it came (Do not push to the side, then move your foot under your bum before recovering it, push to the side, and recover the foot the same direction you pushed out) your toe should be the last thing to leave the ice as you recover your foot. Transfer your weight then repeat the same action with the other leg. Skates roughly shoulder width apart, deep knee bend equals strong push.