Scene hair without teasing?

I want kinda like a sceneish.emoish hairstyle (Not being a poser) But im only 13 and I look really kiddish and my layers always poof even when I straighten it and use an anti frizz serum.. My side bangs kinda curl because of my glasses..I look manly because of my thick bushy eyebrows..My hairs dark brown..and long.. Help me out..