Hey, I think you should go take a look at the RQS site about VPD. In my opinion, for such a young plant, you should increase the humidity a bit to around 70/75%.
I'm just a beginner, but I've been able to learn a lot about VPD, and it seems like that's what your plant needs the most, and what allows it to transpire!
https://www.royalqueenseeds.fr/blog-dpv-le-deficit-de-pression-de-vapeur-booste-les-rendements-de-cannabis--n893
Good luck!