First, body shape. Thin people can directly practice equipment and core strength. Obese people can do aerobic or anaerobic training first. Generally speaking, obese people will build bigger muscles than thin people. Therefore, if a thin man wants to be a muscular man, he must first get fat.
Second, safety. Don't ignore the importance of stretching. Even the most experienced bodybuilders need to stretch. Warm-up before exercise and stretching after exercise are very important. You can go to Baidu or find someone to teach you specific actions.
Third, action. Many movements are difficult for beginners because the core is unstable. So you can do more fixed equipment exercise. Such as butterfly swimming machine, high-position pull-down machine, leg lift machine and so on. Because giving you a fixed posture won't hurt you, it's very important for newcomers to wait until you learn to exert your strength before using free equipment such as dumbbell barbell gantry. The rest is persistence. Pure hand tour, hope to adopt.