Looking for simple skin node setup Blender beginner here. I've been trying to find a simple node setup for human skin -- specifically, skin generated from MakeHuman. Almost all setups I could find on the web were either outdated, or quite complex, involving dozens of nodes and numerous textures (bump, displacement, etc.) in addition to the diffuse texture.

The (obviously basic) setup I have right now is this:



So, my question is: What can I do to improve the above setup, without using additional textures (which I don't have), and without too much additional complexity? Note that photorealism is not required at all; I'm only looking for slight and simple improvements over my current setup.

Update: Here's what my character currently looks like:



The skin already looks good enough for my purposes, but it still looks kind of... flat??
With makehuman textures, you can simply use the principled node and feed the image texture to color and subsurface scattering inputs. 

To provide bump detail, duplicate the texture with Ctrl+Shift+D (this keeps it connected to the mapping node), and add a color ramp to create a greyscale image to feed into a bump node. 

An example of a simple setup could be something like the following:


Click to enlarge

This produced the following result from a makehuman export: