Please step back from this problem and do something that will help you to
relax - take a walk, drink some tea etc. Once you calm down you will be
able to find satisfying answers. Linux is meant to be fun, it's creator
Linus Torvalds said so!

First Catfish is not a File Manager it is a graphical search utility. If
you type "Catfish Linux" in Google it will come up with several helpful
"how to" articles.

When I need to find a file the tool I use is the filter bar in Dolphin as I
am a Kubuntu user. Dolphin is a file manager with many handy features. You
click on the folder you need to search in the directory tree on the left
and press control-i (thats the letter "i" not number 1). A filter bar
appears at the bottom. Type in the item you are searching for and as each
letter is typed it removes all the files that do not contain that letter.
You do, of course, have to type the letters in the order they appear in
your target word but you could find orange by typing "ange" without the
quotes. The path is shown in the location bar at the top.

I'm curious why you don't know where this file/folder is when you have been
using Ubuntu for only a few weeks. Unless you copied over a lot of files
and folders that you had created somewhere else you won't have many files
in your personal home folder, /home/lee (or whatever you log in with).
Don't show the hidden dot files, and look through Documents and Downloads
etc. You may find the item somewhere in there. If you tried to create a
file or folder outside your home space it may not have been created at all
because only root (administrator) can do that, and you will not be root
when you log in.

Remember that Ubuntu is not the same as whatever you used before. It took a
long time to gain proficiency in that operating system. Ubuntu is not
harder, just different. You can do it.