hi there bud, don’t beat yourself down buddy, every first timer will have these moments, just hang in there, . I only ended up with one plant in the end, and she did well.
Personally I would suggest changing your light cycle now, like you I started on 24/0 just in the hope of getting her off to a good start, but I don’t think the plant liked it too much and I started to get taco and dried leaves, very similar to yours. Then I changed to 20/4 with the lights and she started to perk up again, she Really seemed to appreciate the rest. I know these plants are supposed to be able to handle 24/0 light, maybe it’s strain dependent, I’m still learning myself, . Just keep going at it buddy , you will be fine.