You're already on the website.... Head to the trading forum, read the rules, get familiar with the terms and faqs. Take it slow, no need to rush. Edit: Read these two links first http://beeradvocate.com/community/threads/beer-trading-rules-info.229/ http://alewatcher.blogspot.com/2010/11/new-trader-tips.html
On this site or reddit.com/r/beertrade alot of people use it's more organized specially for beer trading
Its going to be another 3 weeks until he actually can access ISO:FT. So yeah, slow down, don't rush it. It can be a dangerous little rabbit hole.
Be careful. VERY ADDICTIVE. In all honesty it's super easy and very fun. My word of advice is communication. Can't stress that enough.
Start off slow, set limits for yourself and trade with experienced people and treat others fairly. When all else fails, don't be a dick.
Study how thecherryman and mcmastersanchez post in the trading forums. Now don't do that and you will have no problems.
You forgot haveyouseenmycellar. Don't be a douche and you'll meet a lot of great people along the way.
(Sam's sells giant boxes of bubble wrap). The day I started buying shipping supplies at Sam's I decided to slow down on the trading (only took three months to get to that point). Take it slow!