I'm an amateur user of Linux with no idea whatsoever on terminals and command lines. A year back I was looking to switch over to FOSS and installed Ubuntu Budgie because I felt at ease with its graphical interface. A year later, I'm stuck on the login screen and despite entering the right password, the screen good blank for a couple of seconds and reverts to the login screen. I searched this forum to find the root cause, and on shifting to the terminal from the login screen and checking all possible sources of error (eg. Ownership of a file called XAuthority, checking configuration of root file, etc), the next step i was told was to remove and reinstall gdm3. I removed it successfully, but on trying to reinstall it, I was told that there was not enough disk space. Running the df -h command in the terminal (i got the command only after a Google search, I'm that much of a rookie when it comes to Linux) showed me the problem.
output of df -h :
As per the Google search result I also ran the command du -hs * | sort -hr and got a result as attached.
Can anyone help me to recover Ubuntu and go back to the GUI? I need the files I have saved to the user directory like Documents, Downloads, etc. C

