Top Fuel,
It sounds like you are looking under the Apple Menu for "storage management". There is no such program. In Finder, which should be your default open program at startup, you need to open the folder for the hard drive and look at the programs and data files in it. You can delete some to make more space. Don't delete anything that you don't recognize, since it may be something necessary, even though you don't know what it is. (In the past I had a call from someone who could not get a program to work. It turned out she had deleted most of the program files to make space, since she did not recognize what they were.)
If you don't see the hard drive icon on the desktop, open the icon for the computer, which will be there by default, unless you have turned that off in the finder preferences. You will find the hard drive icon in the window that opens.
Another option to deleting files is to archive them instead. If there are older data files that you want to keep but don't access often, you can choose to archive them from the right click menu. That will create a smaller compressed version of the file. Then you can delete the original uncompressed version.
I hope that something in my comments will help you create the extra space that you need.