A couple of things:
1) I'm shocked that you have a 6 week old puppy.
Responsible breeders NEVER let puppies go before 7 weeks, and most keep puppies until 8 to 10 weeks.
2) Plan to spay early. By or before 6 months is recommended. Your pup is better off is she is never allowed to have a season, and this also prevents any possibility of an accidental breeding.
3) Train early and often. Look NOW for a puppy kindergarten class, and plan to go through a minimum of 3 8 week courses before the dog is 18 months old.
4) Confine well. Get good fencing if you don't have it, and get padlocks for your gate. It is the unusual Rottweiler that will tolerate strangers on it's property if you are not present. Padlock all gates, and keep them that way.
5) you might enjoy my puppy training article. Many have found it helpful. Feel free to print it out and use it. It's located at
http://www.animalforum.com/dpuppy101.htmBest of luck with your new puppy.