cluzzi

I have recently had surgery on both knees. I am really out of shape and need to get into a program that will strengthen muscle and lose weight and not be too harsh on the knees. Should I find a personal trainer? How does one go about this and get a qualified person? I feel like I need direction from a professional at least in the beginning. I live in San Diego Ca.My surgeon is Dr Callory. Thanks in advance for your help.
Chuck