Just take your time.
Touch, Touch, Touch and Tease, Tease,Tease!
Just have a good time and be gentle at first.
Do a lot of sucking and licking all over her body. Use the very tip or tips of your fingers or tongue to touch her.
She will let you know when to
do things a little harder or faster. When she starts moaning and moving you know your doing something right. And of course ask her.
I love it when I read that a guy is interested to make a girl feel good.