That is absolutely not informative.
Perhaps you could be less terse and more definitive about what happens.
“does not get anywhere” tells us nothing about what you actually see on screen. We need information that does not leave us guessing about what happens. Even a photo of the screen would be more informative than what you have posted anywhere here.
Without more information we are left flapping in the wind and not getting anywhere because we have no clue about where you are or what you see.
Indeed you’re right. So more precisely, this is what is happening. I did follow Alessio’s recommendations and pressed Ctrl-x. I get to the passphrase screen to decrypt the hard drive. I enter the password. The page loads to the computer logo screen with a Fedora logo written below. The Fedora logo disappears and I am left with this screen with the computer logo. After 10 minutes, nothing has changed. I don’t know if this is related, but before all of this happened, I used for the first time Gnome online accounts to connect myself to a Google drive account. I will try to be more precise but English is not my mother tongue and I am totally novice in regard to Linux and Fedora and I was rather annoyed yesterday not to have access to my computer and get my work done… Sorry for the inconvenience and thank you for your help.
That command would be “rm -r Dropbox” which will erase the Dropbox folder and all its content.
Following that (or before) run the command “df” and show us the output so we can see exactly how much drive space you have and how it is allocated. It might be possible to rearrange the partitions and allow the OS more space where needed.