In my family, if you waited too long to have the Baptism ( according grandma\aunts), they’d take the baby into the bathroom and do a quickie baptism.
From an online parish record (different location, dated 1815): "Antonius...statim ac de ventre matris egressus susceptaque baptismae sacra in coelum evolavit" = "Anthony...immediately coming forth from his mother's womb and having received the sacred things of baptism flew up to heaven."
(Thanks to FamilySearch.org for making these records available online)
Thank you, stylin. I have years of Baltimore Catechism under my belt. You are correct. Anyone can baptize anyone-—with tap water or anything with water. Iced tea, Diet Coke, or a Gin & Tonic will do just fine.
So bag the classes and do a home Baptism.