Hey! Glad to hear another person is starting out on the piano!
Anyways, I don't work with sheet music a whole lot, so i can't really give input (sorry!) but i would like to suggest heavily that, in addition to learning sheet music, you try to learn stuff by ear. If that sounds incredibly intimidating, don't worry, because there's plenty of videogame music out there that's piano-newbie friendly, and you don't have to learn the whole piece at first, either. just a melody with possibly a bass line is fine to start out with. Anyways, if you try to do this, i think you will quickly find that your musical ear will improve DRAMATICALLY. it's a very rewarding experience, and i just thought i'd suggest it. Best of luck!