I did work experience at our local vet's when I was in my teen's. It was brilliant experience, unfortunately it was only domestic animals so I didn't get to see any farm animal care or go out on farm visits but still good to do all the same. I also worked on saturdays for a dog breeder/ boarding kennels - great experience helping with newborn animals.
Good Luck! you sound like my older 2 girls, not afraid to muck in, get a bit dirty and enjoying the animals.