Connecting all of your Google services for a business is essential to do right and early - It is also complicated.
Have your website up and running to start. Also arrange for a physical business address.
Here's most of the services you'll want to create and connect. Even if you're not ready to use some of these services you will be much happier if you get them setup now.
I recommend following this order for setup.
- G-Suite / Google Pro. This is your email and Google docs, etc...
- Google Business Page. A Google Business Page is a hub between many other services. Very important.
- Google Analytics