I see that several people have tried to help you, and I probably can't add much to what you already know.
I did look at the vital records index for Louisiana for birth records in Orleans parish over 100 years old, and came up with nothing, even just using the name Stevens.They do say that all the records are not online and they will do a hand search for you.
If you haven't done so, you could contact the Fulton Co. Genealogical Society.Perhaps there is a member who would do some looking for Susie.If she was a writer for periodicals, there might be some record of her.
I just wonder what she was doing in Louisiana - perhaps had something to do with her writing.I did not Google to see if there was a city directory for New Orleans for 1897 and 1898, but that might be worth looking into.
If I find anything you don't already have, I'll be in touch.