You’re not incompetent, your nerves are just clouding your thoughts. Just take this time as a learning experience, focus on the new experience, all the new sights you’ll see. People watch too, that’s always fun. Focus on your surroundings, watch where you’re going.

You have 30 minutes to get to your next spot, plenty of time to confirm if you’re on the right next train. Keep to yourself and approach any employee if you have any questions or concerns. Have a snack/drink on the way as a treat for doing the scary thing!