I see lots of comments about knee injuries, but I can't respond!! I feel you all.
I tore my PCL and slowly worked my way back up from post surgery to running. Slowly! Lots of walking. I'm talking years unfortunately. It took me a while to work on injury-compensating muscle building, but for me, the key was to not rush it! Cycling never helped personally...
If you get bored walking, I recommend podcasts... There's so much good and free content out there.
Low effort, but honest: 🤦