Welcome, deb! Labradors are AWFUL puppies, so what you're describing sounds very familiar. I didn't know if we would survive Kimber's puppyhood but now she's the love of our lives. It does get better.
1. Labs are very, very mouthy. Get used to fishing things out of her mouth. The growling is most likely just play sounds; labrador puppies are very, very rarely aggressive.
2. While pinning for submission was a big thing years ago, more recent training methods have moved away from this. Focus on positive reinforcement- good things happen when the puppy behaves. As your pup gets older, you may also find Nothing in Life is Free (google it) very helpful.
3. The housebreaking difficulty is unusual from what I know and have read about female labs. The occasional accident is to be expected, but what you're describing sounds more problematic. You may want to have her checked for a UTI. Oh, and how often are you taking her outside during the day to pee? Oh- and I see the crate size is fairly big. It should only be large enough for her to lay down and turn around so it' s more den like and she won't pee in her den.
4. Lab puppies are very busy. Hopefully you'll meet other puppy owners at puppy kindergarten that you can set up play dates with. That was very useful for us.
Overall, I'd recommend looking at the big picture. She's 11 weeks. She's still very much a baby. These days (and nights) are really difficult- especially if you're a single pup parent!- but it DOES get better.
And- what's your puppy's name???