Have you tried it this way...
While fresh roll is properly seated
extend the leader so it is a little longer than you need (that is when you pull the film straight across until it slightly extends past the door hinge
align the spool slot until it is facing at you and push the leader tip in and you should have an arc of film
don't let the film mesh with sprocket yet
give it a crank and let the film find the right tension around takeup spool and as the arc of film start to film up against the sprocket
guide it a little as the takeup get a full turn and a half and the arc of film is taught
now close the back
you should feel the tension evenly pay along
the rewinding knob may be spinning too
https://www.flickr.com/photos/mysteryonionpatch/34621206162/in/dateposted/
If it goes wrong you'll see the arc of film not catch with sprocket and skip...a sign the advance gear is not full in gear.
hope this makes sense.