Well, start by doing some requests on the bulletin board and stuff. The first few requests are kind of like tutorials to help get you started. :D Then, you should walk around and see which bachelorette you wanna marry, unless you wanna stick we the default one (Shara).
Conversations about brain lengths are always amusing to read/watch. I'd love to see someone try to have a serious conversation with someone about one without it going haywire. :P