Below are some links to existing blog posts and videos to help you get started. We also host a “Meet & Greet” on the first Monday of every month at 6:00 pm SecondLife time (Pacific time), at the Just Genealogy fire pit, to help newcomers get more comfortable in the environment.
(specific ‘how to’ details may have changed slightly)
DearMYRTLE ‘Get a Second Life’
From FamilyTree Magazine: Genealogists Living in Second Life