It's best to shave in the direction of hair growth if you can, but that can be hard to tell. It's common for pubic hair to grow in multiple directions. Waxing.
Not until you reach retirement age. Typically that's 65, though many pension plans allow you to start collecting early retirement benefits as early as age 55.
University choices and applications are usually started in Year 12 or Year 13. Your school or college will tell you about it. In the meantime you can also find.