Once you start a new subscription, a random site address will be assigned under nocodewp.dev domain. (For instance: site63c69aae5ca02.nocodewp.dev)
You can change this domain easily under Settings > Account page.
You can keep using the existing analytics, or you can reset the analytics data and setup for the new domain. If you choose to reset, the existing data will be deleted, and the new analytics will be setup.