Honestly, pursue it as a hobby but don't try to make a career out of it. This is the worst hiring environment I've seen since the dotcom bust, and there are tens of thousands of fresh CS grads that are unemployed.

If you want to go to school because you're interested, then that's cool. But to think you can make a living out of it when you're 30 years older than the tens of thousands of kids that you're competing against... I really don't think it's worth it unless you want to form your own startup that is medical-related.