Apex domains cannot have CNAME records.
Question and response
Question
dig myhoola.com. NS
Answer
myhoola.com. 2 NS ns-226.awsdns-28.com.
myhoola.com. 2 NS ns-1035.awsdns-01.org.
myhoola.com. 2 NS ns-1444.awsdns-52.org.
myhoola.com. 2 NS ns-1522.awsdns-62.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0