There are many ways to get that pleasurable feeling. Explore your body, it sounds like this is all new for you. Of course you'll be curious. Some people preffer rubbing, others fingering, or both, etc. Also, just remember that if you're not 100% comfortable or don't want to, it's ok to say no or to stop. Being intimate like that needs trust from both ppl.
Okay it's normal to you know but not that much girl your fingers are gonna fall off lol you need to learn how to control it like if you have that urge to do it stop and find something to do like dance clean go to the mall something because if you don't control it you can become sex addicted with yourself that you won't have time for anything else