Looking for advice on getting better at bleaching my hair/up keep involved

26 year old male here with naturally black hair and I’ve already bleached it once, so now I’m more looking for advice on upkeep and keeping it healthy long term. For anyone who’s maintained bleached dark hair for a while — what helped the most with preventing damage, dryness, or breakage? How often do you touch up roots, and are there any shampoos, conditioners, masks, or routines that actually made a noticeable difference? Also curious about things people wish they knew after the first bleach. Any tips appreciated.