There are probably better ways, I'd honestly check youtube or just google. What I've seen is a few options: 1) Set up a chair or bench below you with one foot on it to take part of the weight off and build you way up. 2) I've been to gyms that also have a pull-up "machine" that you set a weight offset and put your feet on a bar that compensates. So, say you weigh 175 lbs, you set it to 100 lbs, so you're only doing pull-ups on 75 lbs of weight. 3) Another option is to do "negatives." So you start in the "up" position, with your full weight, and slowly lower yourself down using only your own strength. 4) Otherwise, you could do some exercises with bands to strengthen your shoulders and back. There are "figure 8" bands that you can use to build upper body strength gradually. As I said before, core strength is a big part of it, too. It takes a decent amount of ab strength to do a pull-up. So, you'd want to work on holding a plank, for example, to build that up.