So, on your first attempt to install, you installed lightdm but only booted to the console? And with this attempt you’re getting dbus errors?
Sounds like you have a damaged installation media. I would download the recent iso again and make sure to run the checksum - there are instructions for that on the download page before you click on the download link.
Recreate your install media and try another clean install - but only select one window manager (or desktop environment) and no login manager. There may be something broken with lightdm.
Hopefully you will then boot to the console and use startx to get to an xsession. If it falls, post any error messages.
Once you get an X-session up and running, it will be smoother sailing to add more window managers etc…