i've used just for men on my eyebrows for years and i've been fine. the box has instructions for an allergy test. just do the allergy test on your forearm or whatever it says, if it's not in the instructions you can google it.
prep by washing your face and eyebrows, dry your face, take some q tips and outline the skin around your eyebrows so that the dye doesn't stain, mix a tiny tiny amount (depending on how much eyebrow you have - no more than half a penny size each) of both solutions and apply. i use q tips or a brush and then make sure it coats each hair with a spoolie. wait like 3 ish minutes, then wipe off the inner corners of the eyebrow and let the mids-tails sit for another 2-3 minutes.
edit: if you remove your eyebrow hairs when grooming them (i personally use a dermablade/face shaver because plucking/waxing/threading is too permanent for me and weakens follicles) then do that after you dye them because the chemicals can irritate the freshly irritated skin around your brows