CNA training in CA?

I am thinking of taking a cna course in CA. I also am looking into medical coding education. Some jobs I have researched for administration work suggest having a cna license. My concern about the cna class is I have a condition with my leg/back. I am able to walk/bend but am in pain and it limits me. My question is if you took cna course can you describe the training and what type of physical things you do such as do you have to lift someone,carry heavy items,etc? I know that if I did this course for a job I would be limited because I would not be able to work lifting people or would I do bathing because of bending etc but I was looking for the education for administrative or possibly working non medical in senior center,mental health,etc. Do you think this license would help me? Thank you for any advice.