Well, it seems that DNS should have updated by now and you should be able to see your site, so maybe you did miss a step somewhere.
I suggest you check the Control Panel -> Domains -> Manage domains screen and make sure that your domain is listed there.
Hosting is a “separate” process from registration and, in all the confusion of setting up an account, sometimes a registered domain never gets added to the hosting system.
If your domain is listed there, and you still cannot browse to the domain, you might share the url here so that others can see if it is reachable for them.
If it is not there, you can just “Add a domain/subdomain” from that screen, and set up the hosting for your newly registered domain (that should be “pretty quick!”)