Definitely do NOT recommend Perfect Blue right out the gate for someone that only saw a few Ghibli films.

Its a great movie, and one that has a lot of cultural significance, but it is not a good pick for a first timer. It has some scenes that are intentionally extremely uncomfortable, and has a lot of cuts that can be hard to follow even for seasoned anime/film viewers.

This is kinda like recommending someone play Postal when someone asks what video games they should try if theyre starting out. While exaggerated a bit, it might be better to start them off with Mario instead.