Here are some helpful links to learning more about genetic genealogy.
ISOGG page with handy chart on centimorgan matches to what level of cousin/relative…http://www.isogg.org/wiki/Autosomal_DNA_statistics
Great article on why you might not find that Native American DNA you were told you had: http://www.rootsandrecombinantdna.com/2015/03/native-american-dna-is-just-not-that.html
Redbone/Lumbee/Brass Ankles and other mixed Native people: http://redbonenation.com/
Native Heritage Project: https://nativeheritageproject.com/
Melungeons*: http://historical-melungeons.com/ https://the-melungeons.blogspot.com/ Please be aware, the concept of Melungeon, Malangu, Tri-Racial or Mixed Indians is a very volatile topic, and there are some theories out there that DO NOT hold water-please read other sites with care. Many people’s theories are “just” theories. Good rule of thumb, if someone is more interested in selling books than the research, that’s a possible red flag.
If you’re on Facebook, I HIGHLY recommend checking in with these communities of very helpful people (and I’ll bet you’ll find some cousins!):
Gedmatch Users Group: https://www.facebook.com/groups/770288949652854
DNA Newbies Group: https://www.facebook.com/groups/dnanewbie/
International Society for Genetic Genealogists: https://www.facebook.com/groups/isogg/
For people looking for Biological parents: https://www.facebook.com/groups/DNADetectives/
Hispanic Ancestry: https://www.facebook.com/groups/456522601027290/
Native American Ancestry: https://www.facebook.com/groups/1514942452068475/