My tips.
Either borrow a trailer from a friend or Go rent a uhaul trailer, don't tell them it's your first time. They have insurance if you hit something! Go drive around an empty parking lot first just to see how it follows your truck. Try backing it into parking spaces, get a feel for how long it is by stopping before the line etc. U-Haul has longer open top trailers with ramps on the back, you can see the ramp but yet they have good visibility, the cube trailer are all blind spot, and car haulers are too low to see.
When driving on your windy roads, go slow and if possible stop on your side if there is an oncoming vehicle. Let them get past you and your trailer.
Small movements on the steering wheel will make the trailer move, just give it a second, you'll be surprised how fast it starts turning.
As your backing up, its easy to fall into the trap of only concentrating on where the trailer is going, don't forget to look at the nose of your truck also, it's real easy to swing it into a small tree or a fence post especially as your learning.