I had some left-hand pain from gripping the neck too tightly, so I went back to fundamental basics. The Violin Tutor Pro YouTube channel helped me remember how to hold the violin correctly. I just had to hear it again and practice like a beginner. There’s a great vid called “How to Hold the Violin Properly Using a Shoulder Rest” in the section called Beginner Violin Lessons-Under 1 Year Experience. Another vid called “Top 5 Bad Habits on Violin-Technique Tuesdays!” talks about proper finger placement starting around 22:25. Hope this helps your hand feel better!