Baby's First Renderer: Daz Studio
Advanced Renderer that Requires Advanced Know-how: Blender
Daz Studio is great at loading the assets they sell you, it's mediocre to awful at everything else. You can't pose or animate for shit, so you're stuck buying (or "sharing") the poses and animations they sell. Iray is a nice-looking renderer, but Daz didn't bother to program in advanced features like out of core rendering (you mix GPU RAM and system RAM), denoising passes (or even the ability to output a noisy images and a denoised image at the same time), or a workable node editor for shaders.
Blender is much more advanced. Posing and animation are great. Cycles is a production renderer used in TV and film, while every video made with Daz Studio is an embarrassing, cringeworthy failure. Obviously you will need to learn how to use Blender to take advantage of all this power, and that's going to take more time than Baby's First DCC. But even when using Daz Studio, you'll want to be able to make morphs and stuff, so it's worth it to start learning Blender too.
Daz content exports to Blender pretty well with the Diffeomorphic exporter. It used to be bad at exporting skin materials, but I reverse engineered Daz's Iray shader and told the exporter devs how to improve it, so now characters look pretty good (if I do say so myself).
I still use Daz Studio for conversation sprites. Like I said, Daz is great at loading presets they sell you. So in Daz Studio it's easy to load a premade pose and reuse it with different clothes, different lights, different hair, etc. Blender isn't made for presets, so it's not as good at that workflow, but it's fucking ace at actual scenes with characters walking around doing things.