Let's talk about the correct method first. First, you need to hold the horizontal bar forward. Many people do pull-ups, which is wrong. Secondly, the grip is wider than the shoulder, that is, the distance between the hands is wider than the shoulder. If you try to master the standard movements, you can try to narrow the grip distance, that is, your hands are close together, which can give different stimulation to your back muscles, but mainly practice widening the grip distance. Then your feet, while doing it, pull back, roughly perpendicular to your thighs, and try to stay relaxed. Chest out and abdomen in. This is a preparatory action.
It takes a lot of strength to do it with both hands, but that doesn't mean that pull-ups exercise your arms. When pull-ups, you should focus on the muscles of your back and try to pull your body with the strength of your back muscles, not your arms. This is very important, you can experience it carefully, and I believe you will find the right feeling soon. Try to hold your chest out, touch the lever with your chest, and keep your body upright and don't bend.
During the whole process, completely relax the lower body, hold your chest and abdomen, relax the upper arm muscles as much as possible, and let the back strength pull you to complete the action as much as possible. If you follow the standard movements, you will soon feel the swelling in your back.
Don't be lazy, don't borrow money, I believe you will soon find the difficulty of this action. If you are struggling, it is recommended to do more sitting posture pull-down first to basically reserve strength.
Remember to focus on your back. No matter which part of the muscle you are practicing, focus on the muscle you are practicing. Feel the feeling of your muscles, and you will feel different.