It's still pretty early on, so I wouldn't worry too much about your baby's sleep pattern, but the other commenters are right about creating "daytime" and "night-time" atmospheres that the baby will pick up on.

One thing we did was to not swaddle the baby during the day, and to let him nap mostly in his swing or bouncy chair. At night, he was swaddled and would sleep in his bassinet/crib.

Congrats on the new baby & good luck!

I would start by trying to make a difference between night time sleep and daytime sleep, by being active a noisy around the baby during the day and i found letting baby sleep downstairs amongst the noise of day time activity and at night putting baby to sleep upstairs in a darker/quieter room. They should soon pick up on the difference and start sleeping better a night, and perhaps shorten the lengh of naps during the day. Hope you get some sleep soon.

All 4 of my kids did that, it's a adjusting to being outside the womb thing. Before they were born, you were constantly rocking them to sleep all day just by moving around normally, and at night when you were still and trying to sleep, they would wake up and become more active, so what we end up with are little ones whos sleep cycles are opposite to ours. She'll almost certainly outgrow it in another week or so, especially if you make night-time more womb-like, (swaddling, white-noise, dark and cozy), and day-time sleeps much less so.
Good luck, have fun getting to know the new love in your life! (And catch all the sleep you can, when and where you can!)