Pain in knee. I attached my mri report.

6 years ago, I fell down while running and injured my left knee a little bit. There was no injury or anything in my right knee at that time. 2 years ago, I started feeling pain around my right knee and sometimes in my hamstring as well. I consulted with an ortho doctor and after 6 months, they recommended that I get an MRI scan. After reviewing the MRI scan, there is tissue pressing behind the nerve/joint and that there might be a decrease in the fluid-like gel inside. They suggested an injection that costs around 20k-25k. I still experience moderate pain around my right knee, both on top and below the knee, as well as in my hamstring. I didn't get to know about the exact issue. May I know exact problem. Could you please teel me about what are the possible solution about this problem. I attached my MRI report.