That is my main goal right now too! I've been working on pull ups for a month and can now do two.... I can't wait until the day I can do 10! I was training my back once per week, but I have increased it to two or three times per week. I start off with two pull ups unassisted, then do assisted pull ups with 20 - 30 lbs of assistance, then do jump pull ups. I also combine back & abs by jumping up to the up position of the pull up (chin above bar) and pull my legs up and down (like a chair).

I couldn't do a single pull-up/chin-up either when I started. I'm up to 3 per set now unassisted. Worked the assisted pull-ups a lot, dead hangs, slow negatives. Got one of those door frame pull-up bars for home too. It's taken a year for me to go from 0 to 3. This too was one of my goals when I started lifting. When I was a kid and 80lbs lighter than I am now I could do 12 easy. Wanting to get back to that pretty badly myself (the rep count, not my old weight lol).

Yes, it is a function of getting your back stronger and/or lowering your body weight, but don't just focus on one functional movement. Stay balanced in your workouts.

90% of the population do not activate their back muscles properly when doing pull ups. It will take time and intention of developing the mind muscle connections. Especially if you are a newbie. Take your time use the assistanted pull up machine and be in contol of the movement. Example s of video on my Instagram account fitnessRXusa

If I were you, since you're relatively new to this, I would start out doing a series of push ups in order to start building upper body strength. I'd probably focus on deads also, in order to strengthen those lat muscles. It's going to take time, so just be patient with yourself. Good luck..............

see above comment s

Yeah, I'm gonna offer some completely different advice from everyone else here. I struggled with chins for years. Literally, for years. I wasn't overweight. My back was plenty strong. I simply could not them worth a damn. I mean it was embarrassing. It wasn't until I did P90X that I got really good at them. Why? I had to do them all the time. That, in and of itself, helped. What helped more was in doing them all the time I finally figured out the mechanics of the movement. It's a back exercise, but if you focus on your back while doing them they are hella hard. Focus instead on two things. For starters, begin the movement from your core. Focus on the first thing that moves is your belly button going straight up. I'm not talking about kipping. I'm saying focus on your bellybutton, or your sternum, starting the movement. From there, don't worry about getting your head up over the bar, that puts all your focus on your back which, again, makes it hard. Focus on touching your elbows to your lats. I don't know why, but it's a mental thing for some people. I've given this advice to a few people now and it has helped every one of them improve their chins very quickly. For some people, myself included, elbows to lats is much easier than head over bar, even though both are exactly the same movement.