I'm a fresh new face in parkour and am not really in shape. One of my first goals is to be able to do a pull-up, then a muscle up, yes, I cannot do a single pull-up. This is because I want to be able to climb up ledges when I grab them.
What i'm asking is how can I train to work up to a pull up? Since I can't do one, it doesn't really make sense to start with a bar, should I try jumping?
Note that I do not have access to anything sophisticated like a pull-up assist machine.