I think you won't be able to really know what to do until you meet your child. You need to 1) meet your child and find out what his/her personality is like. 2) find out what type of parent are you (laid-back, stressed, perfectionist, easy-going...etc.). You also need to find out how feeding is going to go. I had every intention of breastfeeding my first child but ended up pumping and feeding him instead. Sounds like you want to breastfeed and are set on that, though.
But, be prepared. I would have a crib/pack n' play (portable crib)/bassinet or something of that as a bed for baby ready. Just somewhere for the baby to sleep if the baby isn't sleeping in your bed. If you don't have much room, just buy a pack n' play (portable crib) or a bassinet as they take up less room and will be useful for the first couple of months. They also can be moved in between rooms easily.
With my first child, we didn't really know what we were doing. We had a bassinet/crib for him but as it turned out he had to co-sleep with us for the first couple of months anyway. It wasn't a problem except that he moves too much and snores while he sleeps and we weren't getting any good rest. So, then we transitioned him into a crib in a separate room--worked well with the first one. But, with him I had breastfeeding problems so ended up pumping almost exclusively so he was having bottle feeds from the beginning.
With our second, breastfeeding was and is so much easier. She's also a very peaceful sleeper. Falls asleep in one position and wakes up in the same position--doesn't kick or snore.

And we didn't really plan it this way but she co-slept with us for the first 4-5 months. I got EXCELLENT sleep and just breastfed throughout the night. Never had any problems with it at all. Co-sleeping is pretty natural and there are safe ways to do it. You hear these stories of babies being rolled over on or smothered from co-sleeping and I just marvel at that because as a new mother (or a mother for a second time with a newborn) I wake up with every sniffle, sound, cough and movement of my baby and neither my husband nor I drink or use drugs so we are pretty alert even when we're sleeping. But, definitely, breastfeeding is a breeze when you co-sleep.
Now my daughter sleeps in a pack n' play crib in another room. We do have my son's crib but it's bigger and we don't really want to set it up. Time goes by quickly and soon she'll be a 1-year-old. We plan to put her in a "big kid" bed in her brother's room after she's a year old so at this point we won't be setting up another bulky crib for her.
I second what genkimom said. Be prepared (your child should have a safe place to sleep available--such as a crib/bassinet/portable crib) but also be flexible because at this point you have no idea what birth, recovery from birth and your newborn are going to be like--that's going to be a very personal experience for you.