Hi/lo poker

what’s a good strategy for the first three cards in 7 card stud hi/lo?

Enochian, you may want to check the current Blog article, “Ace in the Hole, All-a Time Broke” (Part 2). Toward the end, it addresses exactly that (NOTE: that advice is specific to 7-stud Hi-lo, it doesn’t apply to Omaha Hi-Lo due to the different structures of the games). Good luck at the tables.