It is not the content of you website that gives the first impression of your website to someone rather it is the outlook of your website. If the outlook of your website if attractive people will read your content else they may even move on to another website.
Navigation menu is very important in determining the outlook of your website. If people can't easily navigate through different options at your website they will not like it. The navigation menu should be beautiful and it should also fulfill the purpose.
Many navigation menu plugins are available that put a navigation menu on your website. If you don't have good CSS skills you can use these available plugins. You don't have to change the whole code rather you can just copy this code to the code of your website or you can modify it according to your needs.