1.Blogger login details
2.Domain control panel login details

Redirect the domain to blogger
step1: login into blogger
step2: click settings
step3: click publishing
step3: click advance setting
step4: enter the FQDN (your domain name ex:www.example.com)
step5: click save settings
step6: login into domain control panel
step7: click free DNS
step8: click manage DNS
step9: add A and Cname record
A record (Destination Add=Ipv4) ->add record
Cname record ( HN=www, value ghs.google.com) ->add record
step10: Update the Name server
step11: Allow 24 to 72 hours for DNS propagation