help from girls who like girls please

so.. im a virgin and me and my girl are both ready to do it but we have no idea what to do?? like, okay, i get that sex is totally open to interpretation and can really be anything but i just don't know what to do. i want it to be great and everything she's dreamed of but whenever i ask these questions i never get any answers or even suggestions, im always told to "do what i want". literally everybody knows how straight people do it, but it's like lesbian sex is this well guarded secret that even other lesbians don't know about. i just don't want to mess anything up, and i want to make her feel great. any advice/suggestions/stories??