J.K.
HI E.,
Congratulations!! I know you are looking for encouraging words and I hope you don't find these discouraging... there is a silver lining!! Be prepared to be really busy and very tired for a good while. It is exponentially harder to have two kids as it is to have one. I think the difficult time comes later, when the baby starts to move about, crawling and "getting into" your toddler's stuff and taking up more of your attention for supervision.
However, hopefully your 2 year old is still napping in the afternoon and you will be able to get the two on a nap schedule within a few months and/or at least get a break when one or the other is napping.
Try to include your 2 year old as much as possible in being your big helper. Get outside for walks or park time as much as you can. I wore my son in a sling and then baby bjorn when he was small. It's amazing how much or a difference 20 minutes outside will make for you and your 2 year old. Let the housework go as much as you can stand it... there will be time later for it and it's more important for you to get a rest when you can. Ask your husband and/or friends and family for help. Try to double cook when you make items (like lasagna) that can be frozen for later. My experience also was that when my older child needed attention she really needed it. If I set aside 20 minutes to do something with her she was content to give me time later to do what I needed to do.
The good news is that your kids will be close enough in age that they will play together later and that is a huge thing to look forward to when times are tough in the beginning. Our two are 22 months apart and great friend and playmates.
Don't worry... you'll find the balance!! Enjoy them~ the time moves quickly!