You need to read up on setting up a WDH and what is the reason for using a WDH.
It's not hard to do, a little basic measuring, a little fiddling with angling the ball mount (most likely) backwards, getting the truck fender measurments correct, having the trailer sitting level, not nose up or more than just slightly nose down, etc. Make sure to have adequate tongue weight, 12-15% of loaded trailer weight.
A few hours should have you in the ballpark, then after towing, perhaps a little adjusting or tweaking to get it as close as you can.