NEW GROWER!!! PLEASE HELP!!!

hi, my friend gave me 2 of his male plants the other day and i am just trying to grow them to get experience and just as a little project, but they seem to be dying. can anybody help me out?

are they over watered? i water them 1 - 2 times a day depending on how dry the soil is, and i spray them with a water bottle a few times a day also...

what is wrong with the leaves?

can anybody help me or give me tips? thanks a lot