The two tiny leafs you start off with will yellow and die off, this is normal 
As far as how long you veg it for, you don't have much say in it as it will flower on its own (auto flowers eh!? Hehe)
But as far as using nutes goes, keep the grow (veg) nutes going until the vertical growth stops - around week six(ish)
If you've got the vertical space, I'd just let grow for this one, keep it simple.
Just my thoughts ^_^
As far as how long you veg it for, you don't have much say in it as it will flower on its own (auto flowers eh!? Hehe)
But as far as using nutes goes, keep the grow (veg) nutes going until the vertical growth stops - around week six(ish)
If you've got the vertical space, I'd just let grow for this one, keep it simple.
Just my thoughts ^_^