My boy is 18 hands about 2200 lbs. He's a purebred out of the Justamere Showtime and Koncarlaet lines.
What experiences are you interested in specifically?
Just don't fall for the Gentle Giant crap. That gets more people hurt than anything. Percherons are a wonderful smart breed. But you need to establish trust with them.
Don't rush things. Get to the know the horse. Spend time doing absolutely nothing as well as training sessions. If a horse that big doesn't respect you, there will be problems. Lots of groundwork and bonding.
8 is really late to start a horse that big but if you're patient you're going to have a great horse.
Pay attention to what you feed them. Some people out there believe in the high fat no grain diet (I do) some people think it doesn't matter. My vet recommended it to me and it's been working just fine.
Get the book, Draft Horses an Owner's Manual by Dr. Beth Valentine. You can get on Amazon
. It is THE book on draft horse care. Everything from A - Z.