32nd Infantry Division did, indeed, originally consist of National Guardsman from Michigan and Wisconsin. However, as casualties occurred, replacements were drawn from pools consisting of enlistees and inductees from all across the country.
For years, I've diligently tried to avoid claims of "first", "most", etc., etc., ad infinitum, ad nauseum. 24th and 25th Infantry Divisions, both formed from the Hawaiian Division immediately prior to the attack on Oahu, were the first U. S. divisions to engage the enemy in World War II. They both took part in resisting the attacks of 7 December 1941.
First Marine Division (Reinforced) launched the first major offensive of the war - as well as in the Pacific Theater of Operations - when they invaded Guadalcanal, Tulagi and Gavavutu in the Solomon Islands on 7 August 1942.
The 1st and 2nd Armored Divisions, both elements of I Armored Corps, and the 1st, 3d and 9th Infantry Divisions, components of II Army Corps, landed in Algeria and French Morocco, North Africa on 8 November 1942, thereby conducting the first major offensive in the European-African-MIddle Eastern (EAME) Theater of Operations.
Your best bet for establishing contact with individuals is the division's and regimental veterans' associations. Remember, though, it's been well over sixty years since the division was inducted into Federal service.