The outter rim of this doesn't look too bad, but to be honest the whole logo in general isn't that good. The best thing to do for a logo is to make it a vector black and white logo for the start, then work from there instead of going straight from scratch to detailed. Hence my logo for BetaDesigns which I use on youtube/hackforums for art I sell... SlyCoopers logo that is once again a vector logo that's 2d of course and he uses it for youtube and any art he does if he does art etc... Same with oracle, starts out from a 2d vector logo and then you can turn it into something else. Other than that, a good start at working with Gimp.