Don't freak out. It's really a natural process and quite easy. At the hospital, they will help you to get the baby to latch on to your nipple, if the baby doesn't do it automatically. They'll be a wet-nurse # posted somewhere in the room, I'm sure.
As for what you'll need: definitely a pump. I purchased the one from babies-r-us that had a double pump and that you can carry like a back-pack (I traveled by train!). It worked perfectly. Doing both at once saved time. The pumps pretty easy to use but does take a minute to become comfortable. In the beginning I used the mini-bottles that camae with the pump. It was very convenient and fast cleanup. As the need for more bottles arose, I started using the bags but I would still first fill up the bottles and then pour the milk into the bags. Babies-r-us also sells this tall ice-cube looking container for the storage of the milk. I would date the bags and put the bags in ice-cube looking tray and store it in the fridge. It makes the storage in the fridge much easier as bags don't stand upright. I did also invest in some breastfeeding-friendly bras with the clip on top. I think this is a must! That's about all I recommend. I purchased the pads for leakage and some cream for sore nipples but didn't use either of them. I think Aveno worked best for the dry itch you may experience. I would just keep that in my pump bag.
I'm not sure if you're staying home for 6 weeks or 3 months, but in either case, I would suggest getting up at some point in the middle of the night, in between feedings, to pump while you're still home. The more you pump or offer the baby milk, the more you will produce and for working moms having extra breastmilk at home could be very helpful. There will be accidents and caregivers will spill your precious breastmilk leaving your poor lil' one hungry if there's not another to take its place. It'll be hard making the time to pump at first, and there may not be a lot of milk coming out in the beginning, but keep it up. The more you demand of your beasts the more the milk will come. People always wonder how they know if the baby is getting all that they need. This is a good way to make sure you have enough of it to go around.
FYI: I did a combination of breastfeeding and the bottle but it was always breastmilk. My husband wanted to be part of the feeding process. I think this allows for the men in our lives to bond even faster with their children AND it gives you a little break. Trust me, you WILL be tired, especially since you're going back to work!
As an aside, I have one daughter, now almost 5, whom I breastfeed until she was 7 months, but I have a friend who, like you, had 2 boys whom she didn't breastfeed b/c she just didn't have the patience for it, but then had a 3rd and did. It was a baby girl, not that that matters, but she loved it and was happy for the experience.
Good luck to you and I hope all goes well :-)