Not too bad for under a month. Alot of your sigs are very similar though (I'm lazy, and lately all my sigs are the exact same technique and they take like 5minutes so can't really talk) so try experimenting with other tools and branch out a little.
Try and blend images together a little better also. Using layer masks, smudging and balancing colours and contrast (amongst others ofc)
Also lens flare, whilst fun at first, don't keep using it as it's not all that great. Try using other methods to create lighting.