NEW TO IPHONE 5 NEED TO JAILBREAK TO CHANGE SMS BUBBLE COLORS

Alright so I have no idea what I'm doing with iPhones I'm very new to it but I really want to change my sms bubble colors and everywhere I have read it tells me to jailbreak my phone and download cydia. Can someone please help me step by step jailbreak this phone and than teach me how to download cydia and how to change it from there! I know it's a lot to ask but I would really appreciate it!

Step 1: wait for a jailbreak that has been said by it's own developers to likely never come out to be released
you can stay updated on what isn't happening by checking here: http://blog.iphone-dev.org/