Hey guys. I want to do something with my bow arm.

I recently started violin again after 2 years of break, and I am struggling to improve my bow arm. I think my wrist and finger is stiff, and my upper arm moves a lot. How can I fix this? I want some feedbacks. Also, please forgive me with the poor intonation. I would appreciate if intonation improvement feedbacks too.

https://reddit.com/link/1v446gp/video/7srnby3kwweh1/player