I would recommend picking up a towing guide at your favorite truck dealer. It will give a lot of information about towing, how to use the mirrors to assist in backing up, and that sort of thing.
Even backing your car into the garage each day or into your parking lot space at work daily will help improve your backing ability while towing the trailer.
The secret to backing a trailer is put your hand at the bottom of the steering wheel, and turn it the direction you want the back of the trailer to go.
So with your hand at the bottom of the wheel, moving it to the right will cause the back of the trailer to turn right.
I use a Ford Edge as my towed vehicle. It is able to tow about 4,000 pounds, and has a 300 HP engine in it now. I tow it behind my motorhome, but it is able to tow a smaller trailer, the Lance might be a good match.
Have you thought about getting a class B van? Or a smaller class C RV? You do not need to get a 30+ foot long motorhome, feel free to look at smaller ones. Much easier to back up than a truck and trailer that might be over 50' long.
Just a thought.
Fred.
Fred.