Apex domains cannot have CNAME records.
Question and response
Question
dig hoopwithheidi.com. NS
Answer
hoopwithheidi.com. 3 NS ns-728.awsdns-27.net.
hoopwithheidi.com. 3 NS ns-1350.awsdns-40.org.
hoopwithheidi.com. 3 NS ns-1613.awsdns-09.co.uk.
hoopwithheidi.com. 3 NS ns-271.awsdns-33.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0