Tips for Better Pullups
If you cannot do any pull-ups, you should try “negatives”. Negatives are half pull-ups. All you have to do is get your chin over the bar by standing on something or having spotter push you over the bar. Then, you slowly lower yourself all the way down - let your arms hang grasping the bar fully stretched. Keep your feet up and fight gravity for a count of 5 seconds. This will get your arms used to supporting your weight.
Negative pullups are so good for building strength if you cannot yet do a full pullup. They are so hard, but amazing! Start with 5 seconds and build up. Currently I am taking 8 seconds to lower myself down. Your lats will definitely feel it the next day!