sexual relationship tips?

Maybe you are just quieter, people range hugely in the noises they make, just make sure if you are it's clear later how much you liked it and let her know that just because you're not as loud it doesn't mean you're not enjoying it. Some people laugh loudly at the TV, some just chuckle quietly to themselves, it doesn't mean they found it any less funny. Physically you know your body better than anyone, show and explain to her what things have what effects. As much as it's maybe a little clinical, having a quick show-n-tell will open up understanding (and experiences) in the future. Finally, ask her about stuff you can do during all this, making this only about educating her about you wouldn't be great, and you might learn something new too!

She's nervous, and this is a topic that leaves both parties extremely vulnerable. She needs to feel comfortable, that you won't judge her. Then she can let loose, and you will benefit greatly. The more you make it about her, the more she will reciprocate, and make it about you.

She needs to build her confidence and communicate to her, talk her through it, let her know what you like, otherwise how will she know how to satisfy you?