Some people say that if you’re blogging as a hobby, wordpress.com is okay, but if you consider yourself a professional you need to go with WordPress.org (the self-hosted version). Is it possible to do a professional website with WordPress.com?
Though I’ve seen some successful authors use a WordPress.com powered website, it always surprises me. Yes, you can have many of the elements of a professional site using WordPress.com, but it will always have a basic, less-than-optimum appearance.
If you have the time and the interest, you can develop a nice, professional-looking site by yourself and for little cost using wordpress.org (the self-hosted option), which is why I advocate it.
As an alternative, many people will design a WordPress website for you and even host and maintain it. But the costs add up.
However, if you don’t want to invest the time or if the thought of doing WordPress.org yourself is overwhelming, then focus on making your WordPress.com site as good as you can.