Thanx for posting.
I think a lot of people starting out rush to rendering to get that pretty picture. But before you add a drop of color, digital or analog, make sure you design is something you want to spend the time to render up.
Personally I would rather see pages of loose idea sketches over a rendering (though both are ideal). Step up those line weights. Draw through the design. Design all of the elements and details, keep away from “stock” details (like the square button) unless they truly belong on the design.
Once you nail those things down, the rendering part will flow much much easier.
Drawing is a visual language. A quick sketch is a short story, than a rendering is like a novel. If you are going to write a novel make sure you have something to write about.
Keep it up. I would love to see where you are at in a few weeks or so. If you keep at it a little bit every day I bet you will be astounded.