Angela,
You are starting out correctly by obtaining a copy of a birth certificate. You need to continue using those basic genealogical methods to trace your family. Birth, death, and marriage certificates often have information that may help with tribal research.
I suggest that as you trace your family genealogy, keep good notes on where people were born and died, and where they lived along the way. Migration pattterns are very helpful. If you have an ancestor born in France, called Indian George, it is possible he was a fur trader or voyaguer. The fur travders often traveled the length of the
Mississippi , and could have wound up in
Louisiana from as far away as Canada.
Good luck in your search,
Carolyne