Please correct my introduction 4

I like taking part in volunteer activities too.
I've joined various volunteer work such as cleaning activities, helping with festivals and raising contributions on the street since I was an elementary school student.
My most unforgettable volunteer activity is helping with work of a kindergarten.
When I was a high school student, I regularly visited an American kindergarten in my town and worked there as a volunteer.
In the kindergarten, the main language is English so I practiced English conversion, while having fun.