You will have major problems with growing several plants in 1 pot. Their roots will entangle, some of them might be males, you'll have to cut the males before they pollinate your females. The male's roots will rot in the pot and you won't be able to untangle them...replant while it's not late.

Don't worry about humidity, it's fine, mine's at about 30-35 now too. Also that's way too many plants for that area. You can use smaller pots and replant right now or spread the grow area.

Otherwise they look very nice.