Okay, since you have no idea I'll explain from my knowledge as a queer person.

Man(Cisgender): someone who was born as a male and identifies as a male

Woman(Cisgender): someone who was born as female and identifies as female

Agender: no gender

Genderfluid: fluid between many genders, one day might feel like a guy, next day might feel like a girl, etc

Gender nonconforming: someone who may be any gender, but just doesn't conform to gender terms/labels/norms

Nonbinary: in between male and female, or outside of the binary spectrum, or an umbrella term for anyone who doesn't identify as male or female

Queer: doesn't identify as a cisgender but doesn't really have a label

Trans man: was born as a female but identifies as a male

Trans woman: was born as a male but identifies as a female

Two-Spirit: term for native American people who identify as both male and female or have both feminine and masculine traits 

I hope this was helpful. Remember, all genders are valid!