Honestly, it'll really depend on whether you have high maintenance or low maintenance tendencies. There's a lot that people say is a must have that I personally found unnecessary and a waste of money. The best advice I got was keep things to a minimum, you'll be fine without a lit of stuff, and get things you feel are lacking as you decide you need them. Definitely worth having are postpartum care supplies for yourself, depending on how you plan to deliver; I highly recommend a My Brest Friend breastfeeding pillow too. It saves me a looot of back pain. Super comfy to feed my daughter using that thing, if you're planning on breastfeeding. Obviously you're going to need a place for baby to sleep, and looooots of swaddles or receiving blankets whatever. It's a good idea to get like 5+ footie sleepers for babies born during the winter unless you live in a hot place... Um... Yeah and definitely put together an infant first aid kit! Hopefully you won't need to use it but you're always better off having one! 

I would say that you are going to end up using a lot less than you think you will. There are so many contraptions and things that are available for parents now, I completely understand being overwhelmed.

My advice is stick to basics. Clothes, books, fitted crib sheets, burp rags, diapers (whether you're going cloth or disposable) and bottles or a breast pump. 

People are probably going to tell you things that they think you need, but ultimately, you're going to figure out what you use and what you won't. I know when I was pregnant the first time around, my step mother gave me money to buy a change table, and I used the money for groceries instead. Then when I was pregnant with my youngest, she gave me one. The only thing I ever used it for was storage, because it just didn't fit my lifestyle at all. I just didn't like it, and it was just as easy for me to lay down a cloth or a towel and change my kids diapers on the bed or on the floor.