I just checked out ancestry.com and the only option is to explore my maternal lineage. Because I am a woman, I need to provide information from a relative on my father's side to get that information. The only problem is that I don't know my father or his relatives. How can I determine my ancestry on my father's side without a sample from him?

I come from a cultural and ethnically mixed family. As far as we know we're spanish, french and irish, but it all seems like vague information seeing as how most of my oldest relatives have passed. I'd like to find living relatives and know the true origins of my ethnic background. Can anyone recommend a good ancestry dna website to order a kit, or any other recommendations. I come from a small family, and i thought it would be neat to find more living relatives out there. Thanks!