Right attitude!
In summer 2020 I badly injured my knee in a stupid gardening accident.
Could not walk, never mind cycling.
Fortunately (ahem ... not) I was made redundant, so didn't have to commute.
It was the middle of the first lockdown, difficult to get medical help.
I did the NHS online exercises till I could get to a physio, borrowed a walking stick from a disabled neighbourg, made myself walk (bloody sore!) every day till (took almost a year), the pain was moderate.
Then I borrowed a static trainer, used that at home for a couple of weeks with my commuter on it, till I was happy that my knee would be able to handle stopping because it was my "stopping leg"
August 2021 I was back commuting, not as fit as before the injury, of course, the first little incline almost killed me
I had to put one chair at each side of the trainer at first, in case I felt like falling off, and had to mount the bike using a small stool
You can do it!
Look into a recumbent too, if it could make life easier.
Good luck!
