I want to have sex but im not sure how to go about it...any help?

alright i know this makes me sound like a little kids and in some senses i am, but i want to have sex and have no idea how to go about it...im 17 almost 18 and next year i will be dual enrolled at my high school and the university of south alabama. now a little background that may make this question make more sense. i have no idea about my sexuality as it is a very odd thing (in my opinion). i have no mental desire or need to have sex or the masterbate. i just want to have sex so i can make see what all the fuss is about basically...now like i said, no mental drive to masterbate or have sex. i do masterbate though but more out for something to do in order to kill time not because i feel a need to. porn does nothing for me, it doesnt arouse me nor does it do the opposite. to me its just another video or book. now as im supposed to be a teenager with raging male hormones blah blah blah, this doesnt seem normal. that is bassically the main reason im trying to have sex, so i can figure our if im asexual, bi, straight, or gay...it wouldnt bother me either way but it would be nice to know...so continuing with my original question now that i gave some background, how can i go about having sex, not neccessarily a one night stand or anything but how to get a girl and eventually have it lead to sex...i dont want just another weeklong teenage relationship nor do i want a "hey you want to have sex andt then never speak again?" i hope someone followed the gist of this rambeling question :/ sorry and thanks