I'm 41 and like my job, not switching gears or anything but I was thinking of kicking up the tech knowledge a click or two (B.Sc double in Stats and Math with the basic two year of comp sci, MSc in Financial Math where we did a lot more numerical and computational analysis). I want to learn to organize and do production worthy code (algorithms and solutions I am good at) and more statistical learning. Turns out there are a ton of classes for free online, some lead to certification. If you have a degree already, I'd look into a specialization that is in demand and honker down and forget a degree. Most of the times, a certification in a field of desire can land a first job and you go from there.