New Android owner- att galaxy tab help with Root or sideloading

[dentalexel]

Att had a one day price of $200 for a Samsung Galaxy Tab so I jumped on it. I have it now but would like to use the Amazon Android Market and/ or root the device. I'm using a MAC. Can someone help me to either set it up to be able to root it , or at least sideload apps? I've been an iphone, ipad ,and ipad 2 user and have no idea how to use Android, but I want to learn.

Thanks.
Ken