Setup Nextcloud Server

How do I get a nextcloud server address? I downloaded the Sync your Data from the Get started page. It is asking now for a server address.

Sync your data
Connect to your Nextcloud with our clients for all your devices:

You have to setup your own server or get one from an provider…

https://docs.nextcloud.com/server/11/admin_manual/installation/

https://nextcloud.com/providers/

Sync your Data is step 2, you skipped step 1, Get Nextcloud Server.