Hi. My suggestion for the will is to call the County Courthouse and ask them how to get what you want. That's what I usually do.
For the obituary I'd like to suggest a program called "Random Acts of Genealogical Kindness" or RAOGK. It's a volunteer program where you can find volunteers in the area of your request, like Detroit, who will fulfill one request for you, like look for an obituary. Visit their website and read their instructions for choosing a volunteer. http://www.raogk.org/index.htmlhttp://www.raogk.org/index.html I recently acquired two obituaries that way.