Background info: trying to install Craft CMS on a Vm running on Xubuntu
So, I was finally able to see the glorious monkey screen to signify that I'd made it to the installer successfully, when disaster struck soon afterward... I began the installation, enter my info, and ended up waiting on a very, very long "Oops" screen that just seemed to keep going and going. I looked up some resources about the install process while I waited and thought I'd done something wrong, so I exited the window to try again, because no "back" option was available. When I went to the URL again to reenter my info, I got a screen saying "Page Not Found: The requested URL was not found on this server." I did absolutely nothing after exiting the installer, checked to see that the file I was using in the URL is still where it should be, and restarting Apache (and then my VM) didn't help either, so now I'm stuck.
What should I do? Any and all advice will be very greatly appreciated. I can't find the answer anywhere I've looked!