I Am 46, Been Driving A Truck All My Life, Want To Go To College And Get Better Job, Please Read Details?

I first considered accounting. But a friend told me that at 46 with a background in trucking, I might be a bit too old to embark on an accounting career, since it is usually a corporate job. I am looking for a highly marketable career,
yet one in which my age and background won’t be a detriment.
Please help.