This is a massive plus of website builders compared to web developers. A web developer can cost between $300 and $1,000 for template customization alone, and a fully customized website built from scratch will often amount to thousands. Making your own website using a builder, meanwhile, allows you to get a fully functioning website up and running for less than the price of a coffee.
Think about the different parts of your website and how you want them to look. Some templates have large header areas, others have small ones. Some have prominent sidebars, others are more understated. Templates also have different styles of navigation menu: horizontal, vertical, dropdown, etc. When you decide which pieces you want, it's easier to pick the template that's right for you.
If those template customizations don’t look like enough for you (though if you’re building your first website, they will be), you might want to think about building your website on an open source platform like WordPress.org. You will get more flexibility, but if you’re not a coder, learning WordPress takes a lot of time — especially compared to drag-and-drop builders.
WordPress vs. Joomla/Drupal: Drupal is a very powerful platform that is popular with web developers and experienced coders, but it comes with a very steep learning curve that makes it a bad choice for beginners. Joomla is similar to WordPress and works great for online stores, but you’ll need at least a little bit of technical coding to make it work the way you want.