Have you been to the CAT scales? GVWR is 5500lb, so I would be expecting around 700-800lb hitch weight (well within your trucks capability).
If the hitch weight is too light, it can cause sway issues and a WDH isn't a good solution to that issue. If you are just guessing at the hitch weight, swing by a CAT scale and get the weights with and without the trailer attached, so you know what you are dealing with.
First step to setting up the WDH would be to find the manufacturers directions for setting up the hitch. They usually have a process laid out.
I wouldn't want to second guess the manufacturer but in general terms, you want the front axle weight to be pretty close to the same as when the trailer is disconnected and you want both truck and trailer to sit level when hooked up. You have enough truck now that assuming you don't put 3000lb of gear in the truck bed, the WDH likely won't be as critical but it will improve the towing experience.
