Newbie needs help

Well I would like to start growing my own bud indoor... (grown in a big closet) Just had a few questions if you don't mind it being asked.

1) where is a good place to buy the seeds
2) for indoor growing and for first time which strain is recommended? I want to try to grow white widow, is it too difficult for the first time.
3) How much light (watts) is required.
4) with 10 seeds how much can be grown and should each seed be placed in a separate place.
5) do i need ventilation? (or any other stuff e.g. CO2...)
6) is it better if its a female plant? what do i do with the male buds. what do clones mean?
7) when should it be harvested (more or less)?

Sorry if the questions are stupid. I just want to make sure I understand everything and will read the FAQ's located here. Thanks for the help

online but its sketchy where im from
they all have their difficulties
i have a 250 watt HPS on 2 girls could have more tho but would need vent.
yes in separate place i did ten bag seed and ended up with 4 fems.
in a good size closet u dont need vent. on my light but yes to fans
males have no buds only pollin sacs and if not removed they will ruin your female plants wth seeds
when there ready hard to give estamate.....