My wife learned slowly and started with small trailers. You might start with just the TV. If she is comfy with that move on to the trailer. Maybe even rent a little U-Haul. Don't push the tricky stuff. When she gets that move to the real one. My DW has been relieving me for about 15 years now and does a good job. I try to limit my requests to easy, long straight roads but she has surprised me. I woke up one day and she had driven through ElPaso, no problem. Just be patient with her, don't push too hard, nothing tricky and she will be fine. GOOD LUCK!