I want to be a programmer or at least be building important stuff at 56. I just don't want my sustenance to depend on it. There is crazy ageism in this industr

I want to be a programmer or at least be building important stuff at 56. I just don't want my sustenance to depend on it. There is crazy ageism in this industry. And I don't want to fighting pointless battles, while you could be spending time in peace doing a lot of other work.