Hey man, I hear ya with pull ups, I've never been able to do em well, but I've gotten a lot better since I started working out more. Anyways, things I'd suggest for pull ups is to well, do pull ups. Im not sure if you're a member of a gym but if you are its possible they have a "weight assisted pull up" machine or something to that likeness, if not, which was my case, do "lat pulldowns." These really gave me some extra strength in my lats and back to get my off the ground and doing pull ups. If you don't have a membership to a gym, well, find a pull up bar, or a playground or something to that sort, grab a chair or a box, something that'll bring your head up past the bar, and do assisted pull ups using one leg to balance/help you with each pull up. Just make sure you're arms/back are really working for those reps and its not all just your leg, these, even though they look strange, do work. In any case you'll need to build strength/muscle in your biceps/back, so make sure you're creating enough of a caloric surplus to do this. Best of luck to you, hope this helps.