>>21228610Does your gym have one of those assisted pullup machines? Also you gotta start somewhere OP so just push yourself a little more every few months to build up strength and don't allow yourself to be discouraged. Just don't go to hard and injure yourself like a giant dork. In the meantime you could also do some dumbbell exercises to build more arm and peck strength too which will transfer towards doing proper pullups.
I used to be a skinny skeletor twink before I started dieting healthy and exercising and lemme tell you it takes time BUT if your persistent you will notice a difference and that will further motivate you.
Rome wasn't built over night and it will be the same for your muscles. However, multiple nights that it can do. Also be sure to get an appropriate amount of sleep and drink plenty of water.
Best of luck OP, you'll get there someday.