St. Catherines of Sienna, Franklin Square

I might be using St. Catherines of Sienna in Franklin Square for my ceremony but it seems impossible to find a phone number or who to call. I have no idea how these things work and I'd like an appt with whoever is in charge of the ceremony, booking, etc..
Tried looking online but all I can reallt find is the address... I'm guessing maybe I can just walk in?

You can call (516) 352-0146

You pretty much let them know you'd like to talk to somebody about getting married at the church. You usually meet with a priest who arranges all of that and go from there. Bring along your baptismal certificates also just in case.