[johbjo]

The type of coding that can be self-taught in a few months/years is exactly the type of coding that guys age<30 will be more cost-effective at. A disciplined engineer/mathematician can learn to code applications quickly and possibly at a higher level of quality than 20 year olds, but it won't matter. You will be competing against brawn and caffeine rather than brains.

If you have a background in mathematics and/or statistics, consider transitioning to data science instead.

If you have no science/engineering background, it would be tough.