Having a wordpress website is often a great start for businesses without much web design knowledge – there are plenty of inbuilt features which aid you in building the functioning, attractive website you want, without the hassle of understanding complex code. Free web themes on WordPress can be customised to suit your business needs, and to add functional tools to your site.
When choosing a good theme, you should always think about what the purpose of your site is. If you are looking to sell products, then you will need a theme which can support and work with ecommerce facilities. You may want to be able to show off arty photos and descriptive blog content, in which case you might want a theme to show off these aspects. It is always worth reading the descriptions and demo/previews of each theme to understand what it comes with and what the options are for customising the site.