first time grower 3 questions

im a first time grower so i dont know too much heres a couple of questions I have...
about how much will I yeild?
why is one plant tall and skinny and the other short and fat?
about how far into the flowering cycle do my plants look, or how much time do I have left?

you look like you have a indica and a sativa...you look like you just started to flower for 3 weeks.id say you got another month and a half...probably 1/2 oz offf each plant