Congrats!! I drove a 2010 Sport Trac for a couple of years and it was great. My mileage hovered around 15 mpg combined (I do have a lead foot though). Granted, I'm not too proficient with automatic transmissions (aka Millennial anti-theft devices) so it could've been better. Solid, solid truck that should give you years of reliable service.
One important note though- watch your coolant level regularly and develop a sense for the smell of coolant. The thermostat housing is a composite component and they CRACK!!!! Rangers and Mustangs of that vintage suffer from this too. It's not an expensive part and quite easy to replace as a DIY project but if you turn your back on it it could turn disastrously expensive if the motor overheats badly enough.