Hi Lufc,
I'm your height, too, and I will start flight training within a year. Don't worry for our height, it's not a problem at all. We will just use a pillow or cushion to be fine. Mind you, there are a lot of aircrafts to work on that being short is an advantage, like the B757. Indeed, we'll just need it on aircrafts like Cessna or Piper, but we will never ever need anything like cushion or pillow on jets and regional aircraft thanks to the adjustable seats and pedals.
Our height is very common for girls, and there are a lot of female pilots out there.