Hi,
If you want to connect your .online domain with blogger you have to follow below steps
- You have to update following default nameservers
- Go to Domains > click on manage nameservers and update following nameservers
- ns1.systemdns.com
ns2.systemdns.com
ns3.systemdns.com - Now you have to create DNS records for blogger
- Go to domain DNS management and update your blogger DNS records