Nobody will pass up useful information about bowling that you can easily start applying right now:

Hold on to the cricket ball for as long as possible.
By holding on to the ball, you can create hand thrust that maximizes the effect. Release the ball at the last moment.

Do not raise your hand too high while playing.
If you imagine a 12 o’clock clock, your hand with the ball should point to any hour before 12 o’clock.

The player in front has greater speed than the player on the side.
This is because the front bowler doesn’t need to jump high. If it becomes necessary to jump, it is better to perform a long jump rather than a high jump.

The free hand is much more important than the playing hand.
It is necessary to use it correctly by lowering it. If done correctly, the bowling shoulder will help increase the speed of your playing hand.

Keep your arms and elbows tense during the run and all activities.
Unnecessary movements only distract you from the game. The tension in your arms will help you concentrate on the ball.

Rotate your shoulders fully as you complete the movement.
Imagine that you want to show the name written on your form to the opposite player. This will help you crank your shoulder to the correct amplitude.

Source: https://cricketmastery.com/