Im a first time grower i need some input on some things plz plz help!!!

I just got two 1000w MH / (HPS) lights air cooled digital balest first thing I need to know is how meany plants should I grow under each light I got a good size room. The outhe thing I wanna know is what kind of seed do u recommend for a first time grower I kinda know some things but the more input the better ooh yeah I also would like input on food for my baby for veg and bloom a good soil moss fertalizer to but any thing els you guys and girls can help with just replie to this plz I need ALL THE HELP I CAN GET my friends well to next time stay blazed lol