danners2003 is right, it depends how much you want to tinker with it.
For example, there are many free WordPress themes available to you once you have WordPress installed. And you will probably find a few that you like. But what if you want to change the theme a bit? Maybe change a few colors, or a font or two. With a little bit of learning, small changes like that can be accomplished in a few minutes.
Personally, I would recommend learning the basics of HTML and CSS. There are several free tutorials on the web for this. (Like codeacademy.com, for example) Within a few hours of learning and tinkering, you will know the basics and be that much more prepared if/when you want to further customize your WordPress site. I said “if/when”, but it will probably be “when”. Tinkering with your own site can be kind of addictive, and fun. It’s how a lot of us first got into WordPress, then eventually used it professionally in our jobs ??
Take care!
-Sean