I have a personal doubt about Blender actually

While it's a very powerful tool, I don't think that I have enough "handicraft" to use it and benefit from it's all abilities.
you probably have more then you give yourself credit for, you don't need to be Picasso in order to begin learning, if you don;t have the innate skill, you can compensate by practicing
Remember real that life isn't a RPG where you are born with an very specific class that con only learn a very specific set of skills
As I mentioned in my first message, I'm not capable of sculpting a 3D model from the scratch. Even if I knew all mechanics of Blender or DAZ I don't have the artistic view (at least as far as I know, maybe I have a uncovered gift about it idk

). So probably I'm going to change pre-made assets or I'm going to take a nude body and play with some body parts and add outfits & hair etc. So basically I'll be like playing with a very customizable sims character creator lol.
This is a good beginning as long as you learn to not rely on pre made assets and try to make a few of your own
Since I have no knowledge about topic, I'm not sure if most of the adult game devs like me and should I learn to use blender even for that? Or is daz more than enough for my limited skills and all of the good renders are sculpted from the scratch? In short: Probably I won't be able to do something like
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no matter how much I learn Blender. Can I still have decent renders in blender or daz?
Lets go by parts
Should you learn Blender? A better question is, how much effort are you willing to put on learning? Don't get the wrong idea, BOTH will take quite a lot of effort to learn, but, if you get good at Daz, you will be good at making Daz renders and will be limited to that, but will have knowledge in lighting, posing and some other stuff. If you get good at Blender, you will get good on an actual 3D modeling software, that will open your horizons to multiple other skills like modeling, sculping, texturing, shading, animating, and the ones i mentioned for Daz.
No, you won't be able to make a something like that in blender on your first try, the same way a baby won't be able to run like Usain Bolt when it is still learning to walk, if you aren't not even learning, don't compare yourself to a professional with multiple years of experience, you are setting yourself up to disappointment that way.
Will you ever be able to get on that level? Again, depend solely on you and how much effort you are willing to give.
in conclusion, my 2 cents are:
Are you willing to put a lot of effort for a greater reward? try Blender
Are you willing to put medium effort for a ok-ish result? Go Daz
Are you willing to put low effort for a mediocre result? try a illusion game like Honey Select or its sequel
whatever you do, remember: you will only become as good as the time and effort you are willing to invest