Hi Celtic - from your original post, i read it that you're concerned about knowing what to do with your baby, not how you will fill in your day - is that right?
I'm onto my third now, but don't worry - those thoughts still go through my head. Seems strange i know, but every child is different. I guess my advice would be if your bub is crying - try feeding, changing nappies or clothing, or just cuddling. They usually cry because something is wrong - but i am sure after a little while you will be able to work out why he is crying. Having a good support network around will be of help as well. I used to go to the child health visits armed with a huge list of questions.
You can always get lots of support here on bellybelly
i'm sure you will be a wonderful mummy