Here are some pics of my earlier cakes when I was just starting out in cake decorating in early 2007. You can see that they are the work of a "newbie". Fortunately, my customers were encouraging and insisted that they were "nice" and that it's the quality and taste that matters. Bless them all!
Now, I cannot claim to be an expert. In fact, I am far from it. However, I think I have improved my skills somewhat through practice; and reading up a lot on cake decorating, both in books and via the internet. To me, the internet is a great wealth of information and inspiration. My favorite websites for baking and cake decorating are http://www.wilton.com and http://www.baking911.com
Also, remember, "Practice Makes Perfect!".