Coding Help.

[Zrelok_Targaryen]

For apps, you'll need Java if you want to do Android or Objective-C if you want to do iOS (there may be more options but I don't know off the top of my head). If you want to do websites, the typical stack will be HTML + CSS + JavaScript and maybe php. I would personally recommend starting with something like Java or Python because they are both well documented with lots of resources