As a newbie I found this and even getting the coupler down never easy until commonsense prevailed
I'm sure this has been mentioned...when I hook up, drop on the ball with chocks in place move slightly forward and the wife gets the coupler down and pin in every time now. Unhooking wasn't easy at first either...you must grease the ball for sure, I use wheel bearing grease...chocks of course, move forward to lift coupler easily...the ball has to be in the middle so back up ever so slightly...with the coupler up I can see a gap and use that as a guage to center the ball...lower the jack if, it doesn't come off easy, bounce on the bumper...works every time.