First grow

Hey,

This is my first grow and I have 4 plants that are blooming-
2 AK48, one jock horror and one wonder woman. It is the end of the second week on 12/12 and you can see the flowers already, I'm so happy
About how many weeks do I need to flower? I need to know this so I can start flushing 2 weeks before it's ready but I'm not very sure how to know that...
I would also like to hear any estimate on how much I should get from them. I have no idea on what to shoot for lol.

I'm using 400w hps GH bloom and micro+liquid karma+flora nectar pineapple+sm90

Your advice is welcome.

shoot for a gram a watt.dont count on it though with your first grow! maybe .5 per watt of light. flower time depends on strain. look up the strain on line to get an idea. usually 7-9 weeks id say for most indoor strains. dont guess your yeild it may dissapoint you the first few goes. good luck!

AK48 8 weeks maybe less, jock horror 9 weeks, Wonder Woman 12 weeks maybe more (yes i'm serious). WW is one of the longest flowering strains out there but some argue it makes up for it in yield (not me).