you've already got lots of good advice about nursing. It gets easier, and fairly quickly. But don't expect to get a lot of sleep right now. It's not meant to happen that way! That's one of the reasons we have maternity leave.
When my son was two weeks old, he was attached to me 20 out of every 24 hours. I'm not exaggerating. I couldn't pee by myself. I couldn't take a shower. It seems like the end of the world. And then one day, the fog just starts to lift.
Crying all the time to some extent is normal. I cried and was angry about everything. I missed hanging out with my dog and DH and cuddling. I missed my old life. I think this is normal to an extent, but my level of sadness/anger was not. If you don't feel like you're getting better emotionally, talk to your doctor. My DH set up an appointment for me with a psychologist, and I'm SO thankful he did. Once you get into that darkness, it's really hard to belive you'll ever feel normal again. But really, a year later, I have a hard time remembering just how hard it was.
Nursing becomes fun. I dont' think a whole lot of us actually enjoy the first month-six weeks. It's work. It's exhausting. Your body isn't yours. But I am SO glad I stuck with it. It's one of the things I treasure most about my relationship with Max. It's our special time. And I feel extremely proud that my little guy is a year old now, and I don't even know what formula LOOKS like. It's an awesome feeling Mama. It's hard to look ahead further than your next nap right now, just try to remind yourself what a good, positive thing you're doing for you and your baby.