First off, congrats! And secondly, each pregnancy and each woman is different but I will be happy to tell you my experiences.
With DS (my first pregnancy) I started showing around 15 weeks, but I didn't feel him move until about 18 weeks. This time around with my second it's all happening faster. I started showing about 11 weeks, that's when my friends started commenting. And I felt the first tiny little flutters at about 12 weeks.