You can go to the field investigation, or ask around for word of mouth.
Coaches may be different, and each coach's teaching methods are different.
Some are suitable for you and some are not. After all, teaching methods may not be suitable for everyone.
It is suggested to focus on adjusting a balanced diet, strengthening exercise, relaxing mood and ensuring sleep.
The principle is that consumption is greater than intake. Eat well for breakfast, and eat little or nothing for dinner.