WHAT SHUD I DYE MY HAIR AND HOW SHORT SHUD I CUT IT??!!

Aubrie
Okie so my hair right now is brown with pastel green tips! I wanna get rid of the tips but im not sure what i shud dye my hair all over? I was thinking just brown, red, or im open to ideas!! Also i want to cut it but im not sure how short to go?! I totally wish i could do a longer pixie cut but i dont think i have the hair or pretty face for it??