Google Domains moved to Squarespace, so a domain you bought from Google is now managed at Squarespace. Sign in to Squarespace with the same Google account, then change the nameservers to the ones from the Connect your website domain step on your Getting Started list.
Squarespace domain settings links to Squarespace’s own guides. For the full steps, see Connect your domain.
Changes can take a day or two to show up everywhere. Search engines can take a couple of weeks to show your new site.
Questions? Email team@commitswimming.com.