Can't do bw ones(can for Chins), no assist machine and don't wanna buy some rubber stuff to tie around and idk what, hold meto add my 2 cents,every lurker/beginner trying to figure out things and reading this:
learn and incorporate pull-ups right now into your routine, whatever the goal, whatever the program, Easily the best bang for your buck on Back days.

But I suspect ill be able to in a month or two, oh well