Hello, Karen,
To help give you an visual idea of what I'm writing about, I think it will help to look at a
map of the Magic Kingdom. As you arrive at the park, you can hop on the railroad at the entrance and then disembark at the second stop at Fantasyland. However, you still need to walk a bit through the Storybook Circus area into the Enchanted Forest area to get to Enchanted Tales with Belle.
I personally would walk directly to the attraction since it may be shorter to do so (less than 10 minutes). You can walk there by heading straight down Main Street USA to Cinderella's Castle. Once through the Castle, you'll be in Fantasyland. You'll want to veer a tiny bit to the right and look for the stone walls. Once through the walls, Enchanted Tales with Belle is to your left.
Just another idea, but there are
Main Street Vehicles that may be available as you enter the park. I don't know if they will save you time, but they would cut down on the walking you'd need to do initially.
Have a wonderful trip and enjoy your time with Belle! Please let us know if we can help again.