WordPress is by definition, a content management system (CMS) that allows anyone, without any particular technical knowledge in computer science, to create a website and especially, to administer it afterwards. It is then possible to manage a small site, but most of the time, the result is not really there.
For a professional quality rendering, it is advisable to test and test again by continuously optimizing the site. These customizations include a complete translation of your theme from English to French, the removal of unnecessary elements, or the addition of small personal touches like an original message on the 404 error page. It could be adding plugins to optimize the user experience, or to promote social interaction.
In this section, you will find several articles that will help you use WordPress in the best possible way. Be careful not to overdo it by adding unnecessary elements such as animated gifs plugins!