Hi Mina, congratulations on your new Galaxy Tab 10.1 and welcome to the forum. Nice of you to become a member of Android Tablets, and nice to see you trying to help folks out already. Most of the information specific to your tablet would be found here: Samsung Galaxy Tab 10.1 Enjoy your tablet and the forum!
BTW When you get a chance, please go to your profile and add your Galxy Tab to the Tablet / Device entry. That way folks will know which tablets you have without you having to tell them every time.