very nice. everyone needs to stop saying "female Link" though, read the fucking description.
Concept is good and I personally think it's original. I don't know how I feel about Zelda rocking Link's tunic, would have been cool to see something new. The artwork itself is great. The character looks fine and well shaded but I feel your background is lacking. The artwork and talent is there, I would just say work on your composition. Something so symmetrical is usually reserved for magical/mystical/religious content. But then again, it was designed to be a poster so perhaps the symmetry was intentional. Regardless, keep up the good work and check out a book called "DreamWorlds" if your interested in learning more about framing. It's incredibly helpful for composition.