I going to be honest with you here, it will end up not lasting for more then two months and will be a huge disappointment. Since you have no idea how to treat a girl, the relationship will be really awkward, kind of like "oh ya me and johnny are going out". Yet you guys wont really do anything intimate at all, most dates will involve you and a large group of people/friends. The breakup wont even be a real breakup because there was no real relationship. You will just stop talking about each other and referring to each other as boyfriend and girlfriend. Then one day someone will ask, "hey, weren't you and jenny going out or something?". Although you might consider it a good way to get experience, it really isn't and not worth it.