Hello and welcome!
I love first time moms, singles or multiples either one. I just have a heart for mom-newbies. LOL
I'd encourage you to read, read, read! The "What to Expect" series of books as well as Dr. Sears' "Baby Book" are good general pregnancy resources, and I really enjoyed twinstuff.com as a source of info that's different for us multi-moms.
Come ask any questions or share concerns as you go! We love helping and encouraging newbies! Congrats again!