Does calligraphy really relax your mind?

I recently took up Japanese calligraphy. I have heard a lot said about it being an art that purify the mind and things like that. But so far I don’t feel relaxed much. I agonize over mistakes I make. I’m worried whether I’m writing in the right way, whether I have the right amount of ink. I haven’t seen the relaxing effect of it yet. I’m confused where the relaxing thing comes from.

If you have experience with calligraphy (any type of calligraphy, not just the type I’m doing), can you help me understand?