In my eyes, all the honey select characters look like the women from games like Soul Calibur, Time Crisis and the Resident Evil series. It's a person but it's not a real person. Daz is edging towards the more realistic view and has a lot of settings and add-ons that make it difficult to get the "best" pictures possible without knowing a whole lot. You can play around with it a lot though and there are so many resources out there to help you, and the base game is free to download....
I'm really only starting to play around with Daz3D myself and the most pertinent information you'll need before even looking at the software is that it's not that great straight out of the box. It's entire existence is meant to encourage store purchases so you can improve it. There are different "generations" of models used in the game, currently the newest is "Genesis 8", although the previous generation was "Genesis 3", "Genesis 2" and "Genesis" being the oldest. Genesis 8 models look the best and have the newest features but there are a lot of things available for Genesis 3 compared to the relatively new G8 line. The generations of models within Genesis are listed with a number at the end of their name (usually), with 8 being for Genesis 8, 7 for Genesis 3 and 6 for Genesis 2 with Michael 4/5 (M4/M5) or Victoria 4/5 (V4/V5) being for the original Genesis models. The flagship premium models are Michael and Victoria for all the generations.
Some poses, textures, outfits or other things will work for multiple models but most are for specific generations. You'll often find someone will patch something to work with something else but don't count on it. Within the software, you can set up an environment (that you've downloaded/bought), arrange it with props and figures. You can dress and pose the figures, apply textures and light it all to your specifications, but it's not "easy". The basic controls you have aren't great and you'll find add-ons available to make it easier and your compositions better, the lighting options are limited and you'll have to download/buy something to improve that. Essentially, think of it as you're starting up a virtual photography studio and you have nothing to begin with and you need to acquire, equipment, knowledge, experience, models and backdrops.
I would suggest nosing about with the software to begin with, go through the tutorial and see what you think about it.