I have Speedplay light action pedals that have about a 15 degree float and are super easy to get out of. They are very well suited to road bikes.

I only have to think about unclipping and it happens.

I have SPDs on another bike and the Speedplays are much more friendly on my knees.

My partner had a knee reconstruction several years ago and he also switched to Speedplays because he was getting some knee pain when cycling. He uses the zeros and his knee pain is gone. But for you Catrin, the light action ones would be better (the zeros are just a little bit harder to get out of)