What's interesting is, it looks like your hair type and even face shape isn't all that different from mine. I don't have that pixie cut right now, but I am planning on cutting it that short in a few minutes (xD) or tomorrow. I can let you know how it goes
Also, my hair is shorter than yours and it looks fine. I don't have a picture right now so I can't show you. If I cut my hair tomorrow, I'll post a before and after picture if you want
Anyway, my hair is about my shoulders and shorter, shorter in the back.
If you wanna go for it but you're scared, you can do what I've been doing. I've been slowly going shorter and shorter to see how I like it. First I had it cut to my shoulder blades, then just below my shoulders, then at my shoulders, and here I am now with it maybe just above my shoulders (it was at my chin before it grew to this). By the end of tomorrow, I'm sure it'll have that pixie cut xD
(PS: My hair type might actually be a little less curly than yours, if not about the same. As I've been cutting my hair, I actually noticed my hair type has been a little closer to wavy, but not by much)