Answer:
Dearest (Your friend's name),
I hope this letter finds you well. I'm writing to you today for giving you an overview of my first terminal examination.
I'm feeling pretty good about my preparation so far. I've been studying hard and I feel like I have a good understanding of the subject. I also have been doing practice exams, which has helped me to identify my weaknesses and focus my studying there.
I'm a little bit nervous about the exams, but I'm also excited. I'm looking forward to seeing how much I learnt and to getting my grades back.
I know you're also taking your first terminal exams soon. I just wanted to reach out and wish you best of luck. I know you've been working hard, so I'm certain you will do great.
Let me know how your exams go. I'd love to hear how you did.
Love,
[Your name]