I think there needs to be some narrowing down at least though, does she want to be a generic software developer? A web developer? An App developer? A UI designe

I think there needs to be some narrowing down at least though, does she want to be a generic software developer? A web developer? An App developer? A UI designer? Does she want to leverage her degree? The question as it stands is like asking "What's the shortest path to being a scientist?". Certainly the quickest way is to actually do something, build a website or an app, learn Python and solve some problems. Pick a small personal problem and tackle it. There are some software dev companies that will hire without any coding experience because they would rather teach you themselves. I'm not sure how I feel about that, but maybe it's for some people. Would she consider a programming boot camp? Those are often targeted at getting new developers jobs post-completion.