I see people getting "stuck" on the assisted band all the time! A great way to start to get off the band is by doing body rows instead! I walk through in this video all the drills you'll need to do in order to advance and start doing that pull-up on your own!
00:40 Body Rows & Setting up the Bar
02:11 How to do the body row
02:44 Shoulder Shrugs on Bar
03:16 Flex Arm Hang Holds
03:57 How to advance these