I allways lead new horses on the trail. If you have another old timer pony her, if not You can get the same training, not to mention some exercise by just taking her on long walks off your property. Hook up a lead line and go for a walk, walk, jog, stop jog, walk, make her stay at your 4 oclock. Vary your pace, let her know she's on the trails but still needs to pay attention. Make the trails fun.
Even on ride days I tend to start the same way if I have a green or spooky horse. I ride LD (25 mile ride/races) In the SE these have turned into speed races. I prefer to NOT be in the saddle at the start and head off at a jog, My Walker gets a notion in his head every now and then that he is an Anglo arab, and I'm a buck o five little girl.
Some people like lunging but I prefer to move down the trail to get em settled down a bit before mounting.