should I cut my hair?

Emma • Atheist. Feminist. Introvert.
I'm thinking of getting a Twiggy haircut. Here's me now: 
And this is what I want:
Obviously I'll have to grow out my hair first. I'm kinda scared because I don't know if it would work, but on the other hand it's just hair and it'll grow back. What do y'all think? 😬