m0useanswered grow question 8 months ago Fem meaning females seeds, Photoperiods, Autoflowers and Fastflowers can all be fem.
Autos are more picky and can't get as big as a vegged out photoperiods they also can be stunted easily. It's easier to correct things in the mix if it goes a sway with photoperiods as well vs autos.
I'd go photoperiod if its your first grow. and get seeds from a good brand or clones from someone you trust with good results. Look at the strains your thinking of growing and check out the results on this site of other growing it, compare their style of growing to how you think you want to grow and get a glimpse of how it might turnout.
Good Luck!