Also, if I could just add a bit of advice to this. Don't concern yourself over postwork at all right now. There's a rule we have in photography that also applies to 3D rendering. If you get the shot right in camera, the postwork is largely about just adding flavor. Your goal should be to have your renders look great straight out of Daz, and then you only really need to add flavor in post. The key to any shot, in any photo or render, is lighting. Once you grasp lighting, everything else falls neatly into place. Lighting is everything.
If you want another suggested resource, I've been suggesting
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to people as a wonderful introductory going over many different Daz-specific lighting methods. They're unfortunately not in an entirely comprehensible order on the playlist, but there's a lot of great information there to learn.