Default [Q] SGH-I337, where to start

So my friend has a galaxy s4 that he wants to root, custom recovery, roms.. Etc. So I was wondering where to start? I Have done this to a galaxy note 1. And I know Odin is needed but just would like help with the process for the s4, and possibly links to find what I need. Basically I will be helping with root and flashing a recovery. I know Samsung phones already have a unlocked bootloader. Any help will be thanked!

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