Hi @carolina.mns.pereira, welcome. On the DNS app of the Cloudflare dashboard, can you click the 
next to the first A record and the CNAME record called www to turn them 
?
Basically, I think Quick Fix items 3 & 4 are what you need to do, Community Tip - Fixing the DNS PROBE FINISHED NXDOMAIN error. Post back and let us know if that #CommunityTip helps.
You’ll probably what to do some configuration fine tuning (like I am not following why you have multiple A records), for that, good #Tutorials, This index post makes a good guide for what’s available, Community Tutorials. Let us know how you’re progressing.