I tried to type up my domain name on the internet but it just says that nothing can be found. I have published the site multiple times but nothing changes.
Welcome to the Community for both of you.
What type of hosting plan are you using? If you'll include your domain names in reply, the volunteers in this community will be able to see what resolves for them online. They'll also be able to look up your DNS externally to help point out any updates that need to be made.