Site won't show up after install?

[AlexC]

well, I did have some issues uploading stuff, but that was mainly me being stupid. xD I finally got them into the right folder, and it went smoothly through the install progress until I got to the "enter a database ___" page. For some reason, it didn't show the "localhost" thing, so I guessed a few times at a host name and when I clicked next or whatever, it kept saying that the mySQL couldn't connect or something. I went back two steps and then it showed localhost and I basically did the rest of the install progress smoothly. The only other problem was when I forgot to add a tagline and left it blank.

Was that the problem, perhaps? When I did the wrong host name? D: