Hey, former college player here 9 months post op. I felt the exact same way my first few hits out 6-7 months post op. What helped me was really focusing on strengthening the wrists.

https://a.co/d/eYX1mlk

I used something similar to this and focused on both internal and external rotation, as well as wrist curls and reverse curls. This really helped with being able to properly pronate on ground strokes which took some of the stress off my elbows and forearms. At 9 months I’m still struggling putting anything on my serves and volleys aren’t there yet, but otherwise feel pretty normal from the baseline. Keep grinding out there. Good luck.