Hello! My wife and I just submitted our petition this month, with lawyer's help.

We submitted the I-130 & I-130A.

I believe the next steps will be:
- Wait for I-130 to get Approved
- Pay for DS-260 and File I-864
- File I-601A
- Wait for I-601A to get approved
- Go to consulate appointment (abroad)

See:
https://travel.state.gov/content/vis...d/contact.html

Good luck to both of us!