Help with T. rex texture

So after learning some basic texturing, I made a Tyrannosaurus based on Sue


Only problem is that the feathers have some transparency problems that I don’t know how to solve.

Another thing is that when I render the beast, it looks like this



It’s not only way too shiny but it doesn’t have the fluffy look from solid mode.
BTW, I used this tutorial

first, you need to texture him. do this with gimp, or a 3D painting software like substance painter. or even blender, just look up a tutorial on how to do it properly.

as for the feathers, you need to do some fancy stuff in the node editor. look up how to use alpha textures in cycles.

I did the texturing already. I just wanna control how shiny the skin is in the render. Also, it seems that I need to make a whole thing of nodes before i can make the alpha transparent but I don’t have any nodes. How should I start.