In the old forum, I started a thread asking people for their ten favorite products. There were a number of interesting responses, and among other things there are various starter bundles mentioned. I think the number one product to look at (if you are/will be a Genesis user) is the Genesis Starter Bundle.
Here’s a link to the thread: http://forumarchive.daz3d.com/viewtopic.php?t=190222
One more thing which is important to understand (and a little confusing for new users, as I know from my own experience) is that most of the 3rd Generation figures (Victoria 3, Michael 3, etc.) and 4th Generation figures (Victoria 4, Michael 4, etc.) are ALSO available as shapes for Genesis…basically making Genesis look like the older figure. There are various reasons why you might want to do this…but it’s definitely not essential and as a new user you might not want to worry too much about it for now. The key point here is that there are: older figures like V4, Genesis “legacy” shapes like V4 for Genesis, and newer Genesis-only characters like V5.
At some point you might want to know whether products made for older characters are compatible with Genesis…that’s a complicated question, but the short answer is that textures for V4 and M4 work fine on Genesis, clothing for V4 and M4 works on Genesis but with some limitations, clothing for other figures will work on Genesis if you own the equivalent Genesis legacy shape (but with some limitations), and other products for older figures probably won’t work on Genesis without purchasing additional things to make them work.
Hope this is helpful!