2, muscles should be tight.
If you have too much body fat, you need to lose fat first and do aerobic exercise for more than 40 minutes every day, but the aerobic exercise time should not exceed 1 hour. During the period of fat reduction, the exercise of the instrument can be appropriately increased. As for training the movements of different parts, I suggest you go to Baidu Fitness. There is a post dedicated to action. After successful fat reduction, you can train the major and minor muscles in various parts in a targeted manner.
If the body fat is not too thick, don't eat too greasy, supplement enough protein and have a balanced nutrition every day. Practice two or three times a day, once every other day at first, so that the muscles can adapt slowly. The specific actions can be seen in the essence post in the fitness bar.
For girls, if they just want to practice a smooth vest line, as long as their body fat is not high, it will take 3 or 4 months to work hard. If you want to build a strong six-pack abdominal muscle, you need to supplement nutrition.
I hope my answer can help you.