sleep is never a constant thing for infants and be grateful; this means shes at lower risk of sids!!
1.5 hrs -2 hours is normal for infants. just take your time. sleep when she sleeps. let people help you with other things, like chores, while you deal with the baby. dont feel pressured to have people over and be entertaining, cooking or cleaning while they hold the baby, this is YOUR baby. you need to be resting!! if someone comes over, its likely they want to help, and its likely you can ask them if they would like to help you with chores or something; feel free to ask. if they dont want to, they wont come over LOL. it sounds like a bad thing but its not. lol like i said, you need rest.
the more she nurses, the better your milk supply will grow and react based on her needs. this is CRUCIAL. day and night, night and day, this is what you sign up for. my son is 4.5 years and he wakes at least twice at night to go potty, so im telling you it doesnt end soon. even when they are grown and out of the house you will wake at night wondering if they are ok, safe, fed, etc. LOL. its not so much "get used to it" as it is "im a mom, and with all the blessings i have, im gonna be tired".
you know there are things you can cut out from your life; watching tv late, getting up too early, not napping when baby naps... trust me, 3 more weeks of this and she will be awake much more during the day, so you will need to rest now. LOL. give yourself a break, you just had a baby! you are going to be tired. :):) its normal.
as far as naps, babies cant often sleep on their own, and crying just teaches them you dont respond. i would invest in a sling - a good one - like the moby wrap. its going to be a lifesaver. you can go about your business and she will just be hanging out in there, often sleeping, so you can do other things, and keep her close and safe. :):) the moby is 40$ usually, you can try to find deals online like ebay and such, but even if you have to buy it new it is WORTH IT. we used it with my son last summer (then 3.5 years) on hiking vacations. its WORTH the 40$ no matter how you think about it.
anyway. good luck. sleep will change more often than you can keep up with. just give yourself a break. :):)