Who do i go about it?

I have this site running on joomla and i wanna become an affiliate with amazon and review music concerts and sell them, how do i set it up?Is there any particular software you need to have to put in the buynow thing and where do i start from in short

 

http://affiliate-program.amazon.com/gp/associates/join

 

When you join amazon just go to build links and get the link to the particular item you want to review
after that write the review and incorporate the link
easy

 

thanks a lot. But i still cant believe i wrote who instead of how