Default Getting rid of TouchWiz

I recently got a (free) new galaxy tab 3 7.0 and my verdict is: TouchWiz is ugly, and so are all the pre-installed apps that came with the tab. I'm used to using the stock android framework from Google (galaxy nexus and nexus 5) and I want to give my tablet the treatment and make it more like that. I know I'm going to have to root my tablet and I'll have to "flash a rom" and I understand it will void my warranty. I just want to know how to do it. Thanks in advance for any help.