After registration
Once you've registered, sign in to Second Life and you will start off in Diegoland in Second Life.
There are a number of signs around that will teach you about how to use Second Life and where
to go next.
To get started, download the Second Life client (click here) then login with the credentials you specified.
Notes
Basic accounts are free but a valid email address is required. A good graphics card and a fast internet connection are recommended.