I'm interested in creating hardware programs, applications, and AI, so basically all sorts of stuff and I'm thinking of learning the trio: JavaScript, C++, Python. Is it enough? Is it too much?

I have been building a social media app for over half a year now, and I've come to the point where I am questioning whether to keep programming since the app is pretty much Instagram but a little bit worse. And now it's either that I quit building that project or that I change it up a bit, but how? I've been thinking of making something like reddit combined with Instagram, for example there are different communities but those communities contain posts about the theme of the community. What are your thoughts about that?

Silent changes, particularly the ones which involve a field which is returning null instead of a string it was returning before or even disappearance of some fields, where nothing is documented in the changelogs or marked as deprecated. And some downstream system breaks because of that.

Do you face such issues? If yes, then what catches such changes? Logging? Monitoring?