fioritura?

Yes she has entered the flowering stage!

it's in "bloom" before you see it... with autos, figure it was starting bloom -- equivalent to flipping to 12/12 for a photoperiod plany -- about ~7 days before you could make out the preflowers at nodes. while you can see preflowers with photoperiods if you vege them long enough, with age of typical autoflowers, it's morelikely those plants have already shifted. i've not growna ton, but once those show up the tufts at terminals and nodes show up shortly afterweard just liek with photoperiods... its not different except for how it gets triggered.. one is a ticking time bomb and one you choose.

Yes it's at the very start since there are pistilis but please be careful its an autoflower and I think you are cutting too much

I would call this "flowering", yes. As in, I'd expect the seed company's definition of bloom (e.g. "7-8 week flowering period") to begin from the moment you see the first pistils appearing. However, I'd keep feeding "grow" nutrients for now, as Organoman has suggested. The stretch hasn't finished yet and the plant needs nitrogen more at this time than any other, as they'll grow quickly for another week or two. Bloom nutrients generally contain lower nitrogen, so switching too early will see your leaves yellow etc. Wait until you have proper flower tops developing before switching, or at least wait another week and go 50/50 with grow and bloom nutrients. You should add PK (if using) about 3-4 weeks after the pistils appear, once the buds have elongated. Good luck!

Not quite. She'll stretch a bit more and trow some more pistils.

Well sort of............one or two pistils does not mean the plant is flowering just yet, it means flowering is about to commence, usually in about 2 weeks time. Stick with "grow" nutrients until the first tufts of pistils appear, before switching to bloom nutrients, cannabis still needs adequate nitrogen in early flower.