Wonderful and congratulations!
She shouldn't leave the Us until after she gets permission with an advance parole document which you request when you file all the forms. That takes 909-120 days.
So go off to Vegas and have a wedding and then file everything and wait.
Here is what you will need: Find instructions for each here:
I-130 Immigrant Petition (signed by US citizen spouse)I-485
Application for Adjustment of Status (signed by alien)
I-765 Employment Authorization Application (signed by alien)
I-131 Application for Travel Document (signed by alien- this document permits alien to travel during the pendency of their "green card
G-325A Biographic Sheet (one for alien and one for their spouse)
A medical examination in a sealed envelope performed by a civil surgeon (find one here: https://egov.uscis.gov/crisgwi/go?action=offices.type&OfficeLocator.office_type=CIV
I-864 Affidavit of Support
Two passport sized photos of spouse
Six passport size photos of alien
Copy of alien’s passport including all blank pages and I-94
Copy of US citizen birth certificate, natz cert or passport
Copy of spouse's birth certificate
Copy of any divorce decrees
Copy of marriage certificate
One check for the I-130 in the amount of $420
One check for the I-485/765/131 in the amount of $1,070
The packet get filed at the PO box on Page 6 of the instructions
You can read about the process at this site
Conditional Resident status is granted for 2 years. You and your spouse have to file a joint petition to remove this conditional status within 90 days of the 2nd anniversary date of the adjustment approval.
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