Comparison in art is only good for very short term goals. There will always be someone better and always someone not doing as well. So don't worry about that at all. Just take in bits and pieces of what you like from your favourite artists and things you like to see and you'll be happier with your own work if it reflects that.
Now.. to your drawing. You seem to be well on your way and moving fairly fast for just starting in September. By all means, finish the colouring as it will give you a chance to do a full colour background (I check out your page and didn't see any other coloured bgs yet). Perspective and angles of things could always be worked on but really when drawing cartoons its not that big of a deal as long as its pretty close. Wireframing your drawing to start with should work most of that out anyway. In Photoshop learn how to use the Transformation Tools to skew, rotate, scale, and flip selections around to play with things to test out various scaling and angles on your drawing before you do your final line art (if you are drawing in Photoshop is, for the scanned drawings you can do it too so don't worry). Other than that, just keep playing with Photoshop and always make sure to put things on their own layers to be able to edit things easier if you decide to change them. Everything else is pretty much just preference. There is not RIGHT or WRONG way to draw or colour something. It's all about being satisfied with it.
Good luck.