This past semester for my CIP I did calligraphy every week. There were six of us who got together every Wednesday to sit down, do some calligraphy, and talk. Everyone in my class was so helpful in my progression every week and in understanding my limited Japanese abilities.
This CIP was an amazing opportunity to progress my language skills while making meaningful connections with local Japanese people. I left each lesson with a feeling of accomplishment and confidence. Occasionally, some of us will stay after class for 15 or so minutes and just talk about whatever is going on in our lives, which was really wholesome!
In terms of advice, I would recommend studying calligraphy-specific language so you can understand the instructions. I would also say that knowing stroke order is particularly important as well. That being said, my class was so accepting of my mistakes and helped me correct them. It is a great learning environment!