Positions and angles of attack can matter. Something that feels good for one girl does nothing for or hurts another. And it’s not necessarily a matter of “I like this position” because it’s about how your two bodies interact. It’s very possible you both like different things. I had a girlfriend fairly early on where we pretty quickly realized I liked this and she liked that, and we’d take turns doing the other’s favorite. Dynamics of sexual relationships became a lot less adult after high school.