Hello guys, I have been into iOS development for about a year now. I first started on some udemy courses. I have gone through Firebase and cocoa and many other things. But i still lack some important knowledge. For example: i was creating a clone of some social app and couldn't figure out how to add friends or import the iphone contacts and so on. For experienced and self taught developers, where did you get this further knowledge? I'm still young and don't really know how to proceed now that I have finished all introductory courses and stuff.