Hey Heather,
Congratulations on getting your orientation out of the way. I know you must be so glad to have that over with. As for the homestudy, try not to worry (I know, easier said than done). Our social worker said she would be more concerned if our house was spotless than if it had a few dust bunnies.

They are not out to get you (believe it or not), they just want to make sure that you have everything in order, and know what to expect with an adoption. Just relax, be yourself, and you'll do just fine.
Good luck,