Question

Hello Rabbi Michi,
Mazal tov—our firstborn son was born. In searching for a Torah thought (that is, not just some unsupported nice-sounding idea) for the event, I found that the material one can discuss is pretty sparse (given that we'd prefer to speak about something more pleasant for the audience than the laws of breaking the neck of a firstborn donkey, or whether one may contract the obligation to one sheep when a ewe gave birth to two, and so on). At the moment, the only direction I’m exploring is the difference between redemption and desacralization/substitution of sanctity, if there is one. From a conceptual analysis, it seems to me that there is a difference between redeeming captives, redeeming consecrated property, and redeeming a firstborn donkey, on the one hand, and redeeming second tithe, fourth-year produce, and the like, on the other. The question is where to classify the redemption of a firstborn human son, and the practical conceptual implication is whether we are dealing here with merely a debt, like redeeming captives, or with a transfer of halakhic status, like the redemption of second tithe.
I’d be happy to hear whether the Rabbi has some interesting direction or idea he could point me to.