Hi Roberta, A GEDCOM file is a way that genealogy computer programs communicate with each other. One program takes your data and compiles it in a way that it can be exported as a GEDCOM file and then imported into another genealogy program. It is quite complicated, and is not user friendly. No one would ever want to write their genealogy data in GEDCOM format.
If you want to keep your info on your own computer, you should get a stand-alone genealogy program. If you want to keep your info on the Internet, you can use WikiTree. There are also lots of other online sites, both free and pay.