Here are the basic steps to configure when you first install your site. Go to Setting, Permalinks, and choose Post Name then validate your settings.
Then in appearance you can choose a new theme for your site, in Appearance, Theme, just click Add on top and select a new theme that you like. You can also continue with the basic theme. There are plenty of quality WordPress theme providers where you can buy a nice and fresh theme for $50, it will allow you to give a professional look to your site.
For me the best place to buy a premium theme WordPress is Template Monster or Themeforest.
Then you can go to Appearance, Customize and enhance your site by adding widget, header image, background image or by changing the colors and title of the site.