You are off to a good start. I'd recommend that you start adding sources and some biography for the profiles you have created. From the name-### menu, pick research, provide your WikiTree credentials and try familysearch (free account).
I tried this for your grandfather Henry. I had to add Miller to his first name. That found his sister Dorothy and the rest of the family in the census. From there I clicked on Henry and found his marriage. "New York, New York City Marriage Records, 1829-1940," database, FamilySearch(https://familysearch.org/ark:/61903/1:1:24QD-VQR : 10 February 2018), Henry Miller Busch and Lucy Anna Lockan Young, 15 Mar 1916; citing Marriage, Manhattan, New York, New York, United States, New York City Municipal Archives, New York; FHL microfilm 1,614,463.