Subdomain Squarespace

I skipped steps 2 and 5 and didn’t change the nameservers. Instead, I completed the validation with CNAME records. Is that still possible?

Then, I added an A record for the subdomain (blog) with the target being the IP address of my InfinityFree account.

Now, the DNS status is as follows:

Nameservers: (all marked red with an “x”)
ns-cloud-e1.googledomains .com
ns-cloud-e2.googledomains .com
ns-cloud-e3.googledomains .com
ns-cloud-e4.googledomains .com

IP Address: (green with a checkmark)

Is there anything I need to fix or adjust based on this?