Eat half and practice half in fitness. It is recommended to eat more high-protein food. If you are too embarrassed, you can't practice your muscles. Don't rush to eat after fitness, take a bath and have a rest before eating. The basic principle of muscle training is to destroy 4 to 5 groups of a muscle group, so that the muscles will grow at rest. For the use of fitness equipment and dumbbell barbells, you must communicate with the coach. Don't worry.
Finally, Rome wasn't built in a day, and it will take some time for fitness to be effective. I wish you become a muscular man.