Apex domains cannot have CNAME records.
Question and response
Question
dig iwillbestill.com. NS
Answer
iwillbestill.com. 4 NS ns-361.awsdns-45.com.
iwillbestill.com. 4 NS ns-513.awsdns-00.net.
iwillbestill.com. 4 NS ns-1475.awsdns-56.org.
iwillbestill.com. 4 NS ns-1662.awsdns-15.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0