Since you're new to towing, I'd advise you not tow near the max, at least not at first. I've been doing very similar calculations to yours - hybrid, 650 pounds in the truck - and get a maximum of around 1500 actual trailer weight (not "dry weight").
Actual trailer you can tow = GCVWR - truck curb weight - people and stuff in the truck. 6000 - 3800 - 650 = 1550. (I've been using 3800 as the curb weight as an estimate of the Lariat Lux; the Maverick specifications guide shows a lower "base weight" but I assume that's the base model.)
To the trailer's dry weight, you have to add options, fluid, and stuff you pack into it like food, clothes, and camping gear. 1550 dry can become 1900 actual without too much effort, if your water tank is full.