I am writing a friendly letter to a former teacher, just saying hello and letting her know what I have been up to since I graduated. The body paragraph is mostly written, but I don’t know what would be a good last sentence for the body paragraph.

What I have so far:

[Story about my hiking trip]. It was an exciting experience and I had a lot of fun.

Sincerely,
Me

The “Sincerely” here sounds abrupt. How do I correct this?