Here's a sample postcard for your English penfriend:
Dear [Friend's Name],
Greetings from [Your Location]! I’m having an amazing time here. So far, I've explored beautiful parks and enjoyed local cuisine. Yesterday, I visited a museum and learned so much about the history of this place. The people are friendly, and the atmosphere is vibrant. I really love it here and can’t wait to share more stories with you!
Take care,
[Your Name]
Feel free to personalize it further by adding specific details about your location or activities!