neugs - go buy one of those pull up bars that hang in a doorway, hang it in the door to your room, and practice practice practice practice! Do pull ups every time you go through the door. That's what my son (a current plebe) did, and it helped a lot. Good luck!
Along with pull ups just keep working on general fitness, just get yourself a routine that you like (doesn’t need to be killer) so you can improve your pull ups along with overall fitness.