Use Wordpress Because it’s the standard for managing your website.
Many, many companies use it. And it’s really easy to use.
If you get stuck about how to do anything on your site you can bet that there’s someone who has set up a YouTube tutorial about how to make WordPress do that thing.
A lot of the time you’ll be able to get the job done with a “plugin,” which is just a little program that you install to WordPress in a couple of mouse clicks.