freelancer has never been good with newcomers to arty stuff.
dont get so caught up on it not being exactly the definition of a logo, we've had worse.
an ok base, your understanding of gimp seems ok
design is nothing particularly new or innovative, and the font and blending options on the font are horrible
the colours in v2.0 look dull and boring, prefer the setup you were using in the initial sketch. desaturated colours dont often work, and that watery blue is no exception.
the circle around the blue is also quite pixelated.
keep working and im sure youll improve