Anyone tell me how they are looking its my first grow

Can anyone tell me how my 4 plants are looking, they are different ages but all between 4 and 7 weeks, as you can see the bigger one has yellowing leaves at the bottom, started flowering 1 week ago, think they are all female but not sure any advice would help

I cant tell the sex by those pics but the plants look great though one seems to have small problem. i doubt its serious though if your already flowering. if you see some hairs then you know you got a fem if its balls at the nodes its male good luck with your grow, looks like your doing a great job already peace

looks good!