Thank you for your reply.
I chose to install Wordpress during the set up process. I did not action the link in the email at the time and it said it had expired when I clicked on it, but I had the option to reset the password, which apparently should send another link. These emails never arrive in my email account. Support have said that the links do expire, but cannot tell me how long they last and can give me no indication of why I am not receiving the reset password emails. I use free Hotmail/outlook. The emails are not in junk, so presumably they are being blocked. Dreamhost do not generate these emails I am told. What's odd is that I received the initial one.
My bigger problem is not being able to connect to my domain. The error I get is the one in the first post. I have had a support call logged for over a day, but have had no response at all.
I have just chosen to uninstall Wordpress. I'll re-install it shortly and hope that this solves my problem. We'll see.