I think that while some aspects of Blender are interconnected, they aren't all. If you want to import things from other software, you're still going to need to know the camera system, shading, rendering, lighting. But you won't need to know sculpting, modeling (unless you want to create more for your scene), scripting, animation (unless you're doing a video), etc. Granted, once you start doing that, you may start looking at other things to add. Wait, I can make a tornado?

How much you need to learn depends on what you want to accomplish. My first use for blender was a uv mapper. That's all. Nothing else. I modeled in wings and had been doing uv mapping in roadkill, but I didn't like it. I got tired of bouncing between wings and blender, so I decided to learn to model in it.

---

Available on Amazon for the Kindle E-Reader Monster of the North and The Shimmering Mage

Today I break my own personal record for the number of days for being alive.
Check out my store here or my free stuff here
I use Poser 13 and win 10