Shorter the trailer ... Turn in small increments and go slow
Hand on bottom of steering wheel and use mirrors
If you look back out the window move hand to top of steering wheel.
Practice in large open areas .....
1) just back straight
2) once ok at keeping it straight , start wide circles in reverse ... Both directions
3) once you can do 2 controlled circles in each direction .... Do a long ~~~~~ wave pattern
At this point you should have good control ..... Now set up some plastic trash cans to act as other cars... Trees what ever and back into your set up