My Name Is Maria I'm Looking For My Father I

My name is Maria
I'm looking for my father
I have no names no leads
I was told I needed a man of the questioned family that might be on my dads side
So I did a DNA test on ancestry.com and someone came up as a second cousin and they have a brother.

How do I go about him getting a blood yay done and me and find the results if we are related ? And what kind of blood test would it be
Thank you ? -Maria