Here are the general directions you can follow:
1. Start at North Station.
2. Walk south on Causeway Street.
3. Turn right onto Staniford Street.
4. Turn left onto Charles Street South.
5. Walk along Charles Street South until you reach Copley Square.
Along the way, you'll pass by several points of interest, including the TD Garden (home of the Boston Bruins and Boston Celtics), the Zakim Bridge, the Museum of Science, and the Boston Public Library.
Keep in mind that walking times may vary depending on your pace and any potential delays or crowds encountered along the way.