If there is no equipment, I suggest you buy a pair of dumbbells, which are not expensive and can be practiced almost all over your body. If you increase the dimension, it is best to stimulate with heavy objects, especially the chest muscles. Train two or three times a week. Do 5 to 6 groups at a time, each group is 8 to 12. The biceps brachii and triceps brachii muscles of the arm are relatively small, and the most important thing is to exercise in place, and congestion is effective every time. Train about three times a week. There is no need to buy hormones, because you are not a professional athlete and can't reach that intensity. Eat more eggs and muscles. After a period of training, you can buy protein powder. It's available online. I suggest you buy domestic products, and Kangbite is better. Generally, training in the gym for three months can have obvious effects. I'm not sure without equipment. It depends on your efforts.