Congrats and welcome to our forum and the world of drumming! What a nice sister you have. I can't really tell what kind of kit you have there, others on here will be able to tell you more about that, but I can tell you the first thing to do is to find a teacher in your area. If you are not sure where to look, try local music stores (that's where I got a recommendation for my teacher) or check out ads on craiglist.
Second thing, you've got a kit, you may want to spend about $30.00 and get a practice pad to go along with it. It's a great to use for learning rudiments and for when you can't practice on the kit because of the noise. Almost any teacher will probably have you get one anyways.
Congrats on your new adventure...and keep us posted on your progress. Don't feel shy about asking questions, there's a world of drumming knowledge here.
Good luck and Happy Drumming!
MaryO