Dear William,
Thank you for your email! I'm glad to hear you're taking up tennis. It's a fun and challenging sport.
To answer your questions, my favourite type of sport is football. I find it really exciting to watch and play. I usually play football twice a week with my friends at the local park. Sometimes we play with other teams, which makes it even more fun.
I hope you enjoy learning tennis and have a great time playing!
Best wishes,
[Your Name]