Geeetech

Hi, I did my first print with my Prusa I3 Pro B by a Thingverse sample cube design: https://www.thingiverse.com/thing:1278865.
I observed that print quality is very low.
Which could be the causes?

I attached 3 photos.

Hi guys, I'm a newbie and I would to know what I must do after assembling. I suppose I must follow these steps: 1) Install Repetier-host. 2) Install firmware and drivers. 3) Calibrate axes. 4) Calibrate extruder. 5) Print my first piece. Are these steps correct? Where can I find tutorials to do them?