My baby is almost 4 months and is desperately trying to crawl. But he gets frustrated coz he is still unable to push himself ahead. Anything that I can do to help him?

Let him try. He will succeed. Put some moving toy in front of him. But honestly I think at 4 months crawling is a bit too early. He must be trying to roll.

He has already rolled

When he is on his back he rolls over on his tummy and then tries to push himself forward. Since he is unable to do so, he ends up going round in circles and starts screaming coz he can’t move ahead

Hey don't do anything...the baby will automatically do it when the body is prepared ....just keep watching the moves .;