I'd say for once don't push yourselves. You don't have to do every sex technique just because other people do it. If neither of you likes it, just let it go and focus on things you like. And if you want to do it, maybe take it slow. Let the person who is overwhelmed lead the pace. Agree on some signals and cues. Don't be disappointed. Just stop and change to something different. It's alright if it only lasts for a short moment. Maybe you can work your way up. But don't push. Sex is about enjoying it, not do something specific.
That's about learning to give and receive. About setting boundaries and learning each other's level of comfort. Maybe it helps. She has a free game(PDF) further down on that page.