The Grafana backend has a number of configuration options defined in its config file (usually located at /etc/grafana/grafana.ini on linux systems).

In this config file you can change things like the default admin password, http port, grafana database (sqlite3, mysql, postgres), authentication options (google, github, ldap, auth proxy) along with many other options.

Start your grafana server. Login with your admin user (default admin/admin). Open side menu (click the Grafana icon in top menu) head to Data Sources and add your data source.