My birthday is coming up soon?

So like, yeah. My birthday is coming up pretty soon. Couple months actually. Buuuut, I want to get my hair dyed. Well not like all of it, ya know? I just don't know how. Should I get the bottom half done? Or highlights? Or all of it dyed? My hair is brown, but it sorta looks like I have highlights. I'm thinking about the color red or blue. Help me out? (: