Sigma,
If only your foot/leg is weak and your arms are normal, there is a simple adaptive aid that can put you back behind the wheel. Lots of paraplegics drive safely. Your car can be fitted with a hand control that activates both the gas and the brakes. I have one on my car that I use only for braking. I think I prefer it to a foot brake even if I had normal leg control. It came on my wheelchair van when I bought it from a paraplegic who had no use of his legs at all. I didn't need it at the time but quite enjoyed the ease that the hand control offered.