Lazy Gallery- nothing happens.

Okay- so yeah I have no clue what I’m doing here. But I have a good friend who helped walk me through the installation of the Lazy gallery, and I can go to admin and activate the plugin…but nothing happens. Forgive me if I’m being totally lost- but what do I do now? I’ve got picasa on my comp- and I’ve read here that thats a good plugin- but I cant finda download for it. If someone could help in one of these areas…. I just need a working gallery.