Absolutely, a fantastic idea! When I first got into riding, I would show up early and help out, learning the ropes, and stay late (or, as late as my ride was willing to let me, I was like, 9) and help feed, etc. My grandmother had (still has them, but also had them when I didn't) horses, and I would visit her place and watch her vet and farrier calls. She has a pro trainer out for her QH, and I've been down to watch her horse's "lessons," and get ideas for training my own horse.
Also, watching shows, and even lessons if your barn allows it, can be really beneficial. You can see and learn a lot.
A stubborn horse walks behind you, an impatient one in front of you, but a noble companion walks beside you ~ Unknown