You sound so excited. I remember how anxious I was to get Sophia! What a day that was. I'll never forget it. Today is a special day for you, enjoy!!
Advice: I would have a low key day, no stores or visitors at first. Let him get used to you and start attaching to you before you add too many other things to his new life. I have a daughter that I adopted from Guatemala, so I learned a lot about attachment (she was 9 mos. old when she came home) and I basically applied the same principles to Sophia when she came home. Lots of holding and petting and cuddling. Carry him as much as he will allow you too. Lots of contact!!
Have a great day. Let us know how it all goes!