Filing USCIS forms are easier once you read the instructions. Download instructions for each forms (offcourse those which you need) from USCIS website and read them. If you want to save some money, YES read them CAREFULLY.  Explore some good immigration forums and post your questions too. One of the forums:

http://forums.immigration.com/forum.php

If you still have problems, email me and I might be able to guide you through.

Good Luck!

( I am not a lawyer, I am willing to help as I have gone through this process)

- Jangali Maanab