I think Math is helpful mainly in the sense that because my brain is geared towards math, I love coding and am addicted to learning as much as I can in that area. It uses a lot of the same logical and algorithmic thinking as well as problem-solving abilities. My background has also made me a lifetime learner, so I keep going back to school, and books and video tutorials for more when I’m not working on client stuff. 
I found that being older and being a woman has not been a deterrent at all to learning and doing web development - it has only been a problem in other developers’ perception of me as a web developer.