How old is she?
I am of the opinion, that a child should choose what instrument, according to what floats their boat.
When I was a child, I took piano. Why? Because my parents said we had to take piano. I HATED piano. I hated taking lessons for all those years. Sure, but I learned... how to make music/how to read notes/how to play/how to do everything. Fine. But I still hated piano. It is not the instrument for me. Even now as an adult... I do NOT regret not liking piano. At all.
BUT IF a person, likes a certain instrument intrinsically... then they CAN and will learn, how to play. Pleasantly. And willingly. And it will be fun. And they will want to practice it.
Anyway, I learned to play other instruments. As well as the piano I hated. But, I also play the Oboe. Which is one of the hardest woodwind symphony instruments to learn. But I LOVED it. I mastered it. It was a joy. That was the one instrument, I adored. And learned, willingly. I chose... it. I did not care if others told me it was hard to learn.
To me, it does not matter, what is learned at first. It doesn't matter what instrument is easier on the ears or not to the listeners. Or what is harder or easier. It matters, what the person, gravitates toward. Then they will connect, with the instrument.