Domain Issue One day after buying from shopify

[Kaeden1]

I bought my domain yesterday and was bombarded by messages all in red yesterday saying there were multiple errors.  Those are gone now but whenever I go to the domain “postureprotector.store”, it says DNS resolution error

now.  Before, the site was insecure.  I’m not sure if this is part of the process.  If you can help me understand this thank you so much.

[Kaeden1]

It also says the SSL certificate is still pending if that means anything.