It depends on what you want to do.
"If Link was actually a girl" probably wouldn't look any different - Link would just have breasts but there's not reason any other design element would need to be different.
If you want to make a "sexy girl Link" costume that's another thing entirely and it's up to you whatever you want to do because you have total artistic freedom.
Disclaimer : This post written by a Grumpy Old Man
Actually in the pipes:
- Remaking Ser Loras doublet.
- Luke Skywalker, A New Hope
- Wind Waker starter costume in swim material
Eventually: Paul from Dune, Faramir, Harry Sullivan