Tongue - its a magic little thing use it on her - make her go crazy be confident and dont be afraid of going down on her with your tongue
Finger - you have 8 of them (+2 thumb
) use them too - make her orgasm before putting your thing in and after
and other suggestion above are good too - cockring - you could even try those condom that prolong your erection
let us know how it goes
and have fun