But there is a lot of knowledge in the word "muscle gain". If you want to have a good figure instead of simply gaining a little weight, I suggest going to the gym. Because fitness is a sport involving all major muscle groups and small muscle groups, using gym equipment for strength training can help you exercise to all parts of your body. If you are only in the dormitory, first, the space is small, and you just do push-ups, the stimulation to muscles will not be obvious after a long time. Second, there is not much training that can be done.
3, muscle building is not a light exercise, not to mention half an hour is really less. Besides training, diet is also very important. The protein powder you asked is actually a dietary supplement. If you insist on systematic exercise and eat enough nutrition in your diet every day (strength training destroys muscle fibers, and enough nutrition makes muscles grow bigger), you will certainly gain something.
4, about how to eat, how to practice, you can search online more. Recommend a youtube blogger named jeff calvaliere, which is very suitable for beginners. Don't worry, you don't know anything. I also started from ignorance, gradually studied, practiced blindly for the first three months, and gradually learned how to exercise scientifically. Now I'm half the boss.
5. The most important thing is persistence.