A theme is what makes your website look like it does.

We are going to be using the Twenty Seventeen theme as a means to get started. There are thousands of free themes, as well as thousands of themes you can pay for. Many of the Paid for themes have a free option that can help you see if you want to go ahead and pay for the full theme.

In this picture, you can see that Twenty Nineteen is the currently active theme and that there is an Activate button available when you hover over Twenty Seventeen.
Go ahead and click on the Activate button of Twenty Seventeen.

Twenty Seventeen should now be your active theme.

Now we want to Customizing your Theme.