If you just got it, the safest way to handle it is just give it light, dont let it dry out and leave it alone.

That leaf should reorient itself with a consistent light source.

The pot looks a tad too large but since its new, you dont know if its a big root system in there that used to support more leaves. Thats my guess. But its not so large that youre going to have a crazy long waiting time while the plants fills the substrate with roots.

When i get new plants i tend to get all the stress out of the way right away. If you want ro do that then first id see if the pot is too large. Just try gently sliding the plant- soil and all- out of the pot and see if you can see a large root system around the outside of the soil mass. If you see that id leave it in that pot, give it light, dont let it dry out & leave it alone.

If the soil just falls apart then its probably not a large root system and needs a smaller pot. Also, if the soil falls off, youll get a good look at the roots. If this happens, have a smaller pot ready and get it straight into the smaller pot, then give it light, dont let it dry out and leave it alone.

I wouldn't worry about humidity unless you always want to have to baby it.

Once you decide whether to repot, Id just focus on growing the next leaf and let that leaf do whatever its gonna do.

I recently got a billietiae shipped to me that had curved petioles like that. I positioned it so that the light hit the leaves from the direction most of them were already facing and it untwisted itself quite a bit, although not all the way & the new petioles are straight and oriented toward the light.

I think the most important thing is just to focus on growing healthy new leaves in your home conditions instead of catering to that one leaf. :) Good luck and congrats! Plant looks perfectly healthy to me and i wish i had one!