First of all, we must ensure a reasonable diet. In fact, fat people are easier to shape than thin people, because fat people have meat there and thin people haven't finished fitness yet. Fat human flesh becomes muscles, and thin people are ribs.

For people who have just started fitness, they should warm up before each fitness, and they can walk or run on the treadmill for more than ten minutes.

Such a good figure is the most important thing. Even if you have a lot of muscles, you look like an old man. You can practice latissimus dorsi.

Then you can practice pectoralis major, and do push-ups with a shoulder pole or special equipment for practicing pectoralis major, so that practicing your back chest can make you look tall and straight, and walk with your head held high and your chest held high.

Then practice biceps brachii, triceps brachii and forearm muscles (needless to say)

Finally, there are abdominal muscles (needless to say)

Leg muscles ... practice if you feel the need.

There should be a coach in the club. Ask the coach more specifically. The coach must know this better than the average person.