If your requirements are not limited to this, you have to practice with some equipment, such as bench press, barbell and bench press. Barbell is very adjustable, and different grip distances will make the parts of chest muscles different. The narrower the grip distance, the closer the training site is to the inside, and the middle seam of the pectoral muscle can be shaped. With a wider grip, you can shape the outside of the pectoral muscle. In addition, the bending and stretching of the parallel bars arm is an effective action to shape the lower and outer edges of the pectoral muscles. In fact, it is more important to adhere to the principle of "acting according to one's abilities, step by step and lasting safety".
If you are not careful, you will get hurt, which is counterproductive. Proper nutrition and recovery are important factors and should not be neglected. If you want to grow muscles, protein is necessary, and protein is the foundation of muscles. It is necessary to supplement enough protein every day if you want to gain rapid muscle growth.
I suggest that you can choose to go to the gym to exercise if you have the conditions. There are specialized coaches, sports equipment and training venues, as well as considerable exercise partners and the resulting environmental atmosphere, which will get twice the result with half the effort.