1)where is hymen located?can i see it by myself?

It is the front door: The hymen, if present forms the entrance to the vagina.It is usually a thin layer of tissue over the vagina entrance with hole or holes that permit menstrual flow.It can also disappear in a fetus or be lost in early childhood .You should expect to find it about a half inch deep inside if the labia minora & see it in a mirror. . You can find pictures with a search engine

Not to worry: It's where the vagina meets the vulva, and can be seen by girls using a mirror. Young women and girls may be judged by their happiness, their friendliness, and many other wonderful traits, but not by the condition of their hymens. It makes absolutely no difference whether a person has a big hymen, little hymen, broken hymen, or no hymen at all, as long as mucus or menstrual blood can flow through.