I've been seeing a golf PT since August. Hope they're ok with me sharing these stretches (they're active on GS)
The pics have awkward dimensions but this was the most concise way of sharing. The PT app doesn't allow video sharing, otherwise I'd send them to save you from finding good ones in plethora of garbage on YouTube, etc. Maybe start by finding video for a couple stretches/exercises that look interesting and build from there.
If your insurance covers physical therapy for rehab find a golf PT to address "an injury."