As a new Jeweler, your 3 or 6 month personal website trial subscription begins when you setup your website (including a form of payment that will be used after the trial subscription ends).
To setup your website simply log into the Jeweler Site > My Account > Personal Website (tab) and follow the prompts.
Please keep in mind that as a new Jeweler you will need to enter a form of payment to setup your Personal Website even though you will receive it for free for 3 or 6 months. This is to help ensure that after your free trial expires your monthly website subscription will remain active, so you do not have a disruption in service. Of course, you may cancel your website subscription at any time.