Welcome... you made a good start!
Just one quick comment... there appears to be a lot of aliasing (jagged edges) in those renders, though it might just be the upload quality. You can anti-alias the render by using more than one pixel sample in the render settings. 3 will give you much smoother edges at a minimal cost in render time; there is probably no need to go any higher at this stage.

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)