is witchcraft for guys and girls or just one.

Hello there my dear,
Asking how you know if you are a witch is very similar to asking how you know if you are a Catholic… or a Muslim… or a member of any other faith or religion for that matter. Which is to say, there is no “witch litmus test” as such, just as there is no “Christianity litmus test”….
Being a witch is a matter of faith and belief, just like with any other system of beliefs. Being a witch is about a lot more than simply casting spells. It is much like any other system of beliefs in that the trappings and rituals are only small portions of the overall whole. And thus, much like taking the Eucharist does not make you a Catholic, intoning a spell does not make you a witch….
Becoming a practitioner of the wise craft requires a very real level of commitment and dedication. It is neither a quick, nor easy road to undertake and I would never suggest it to anyone who is going to take it lightly.
So, if you think you might be interested in one of the many belief systems associated with being a witch (I personally am a wiccan) then I would suggest you take the time to do a bit of research and learn a bit about the dogma of the beliefs….
Perhaps look for a bookstore in your local town that caters to such things and go and speak to the people there about their experiences and how they went about finding their faith….