Originally Posted by Neurochic

There is no reason that you should be stuck unable to drive even though your knee is giving you these issues. Assuming your car has automatic transmission then all you need to do is have a simple set of push-pull hand controls fitted. They only cost a few hundred $s and are extremely simple to use. They don't require any special tuition or anything else like that. Everyone else can still drive the car using the pedals as normal with the hand controls fitted. They are a basic, very common adaptation for disabled people and have been around for decades. If you do recover, they can easily be removed. There is bound to be someone in your area who can supply and fit hand controls to your car. Google will tell you all you need to know about the controls available and where to go for supply and fitting.

Its possible to purchase various brands of temporary hand controls which can be easily moved between cars and are handy for e.g. using in rental vehicles but they are much more difficult and less instinctive to use, especially when you are new to these things so I really very strongly wouldn't recommend these for you.