Just so you know, I finally graduated college in 2003 after grad. high school in '67. It was the proudest moment of my life. I used CLEP (college level education program, i think) tests to get about 10 classes, including the entry level English with composition they required. The tests cost less then $100 when I took them and they were great for requirements. If you buy the books and can do the practice tests you're all set. I used them for a marketing class, and other things I had learned from many years of working.
You might also be able to get credit for life experience if you write up what you know. These type of non-traditional methods of moving ahead can be a huge help to older students who want to graduate but also have lives at this point. If you would like any more info I'd be happy to help. And I know you'll do great on the placement test, so good luck!