Dear Andrew,

Thank you for your letter. It's always great to hear from you! I was really interested to read about your grandma learning French. It’s inspiring to see someone taking on a new challenge like that!

You asked about my experience with English. Well, I find the grammar rules quite tricky sometimes, especially when it comes to tenses. There are so many of them! To improve my English outside the classroom, I like to watch movies and TV shows in English with subtitles. It helps me to get used to the language as it's really spoken.

As for the best way to learn a foreign language, I think it's important to find something you enjoy and to practice regularly. Maybe you could try to talk to people who speak the language, or listen to music in that language. Finding something fun is the best way to keep you motivated!

I hope this helps, and I'm looking forward to hearing from you soon!

Best wishes,

[Your name]