Some horses will be sore after being shod. Others may become sore within 24 hrs. These horses should be rested at least a day before riding. A sore horse should never be ridden. Some horses will not become sore and can be ridden immediately.
you don't have to wait, you can ride right after
A horse should be exercised every day if possible. You need not ride it every day, as long as it gets some form of exercise-even just being able to stretch its legs in a paddock for a couple of hours. You can also lunge it.
get on it
no
You should ride the horse you will learn the most from.
not if ride for a long time
Riding a horse for about 1-2 hours every day can help it become more agile and used to being ridden. The more you ride a horse, the more advanced you become and the more the horse is ready for bigger things like jumping and shows.
Well it doesn't matter what breed your horse is, the average age to ride horses is between 3 to 20 years of age but if your horse has any medical problems like arthritis it might not be able to be ridden as long.
20-25mins
I have heard 6 months
It depends on the severity of the cut. If it is a deep cut, if it bleeds when the horse moves too much, or if the horse limps from the pain of it, then no, you should not ride the horse. However, if the horse doesn't limp because of it, if it doesn't bleed, and if it isn't very deep, then I think it should be OK to ride. Ask your vet to be safe.
at 2 or 3 years is best but should probably be done by 6.
Ask the horse's owner if they will let you ride their horse. Remember to ask nicely! You should also make sure that you can handle a horse right. I am sure no one would want you riding their horse if they thought you would not treat it right ,Good luck!