Hair care routine after brazilian keratin treatment

I’m thinking of getting a BKT again. Before you comment something like “noo don’t do it because xyz” you can save your breath because 1) I don’t care if my curls don’t come back theyre a pain in the ass 2) the first time I got one I went to a professional and my curls came back just fine

To those who get BKTs, what was your hair care routine like after? I didn’t really know how to take care of my hair the first time so I don’t want to repeat my mistakes