The employer would 1st have to file a labor certification application (PERM) with DOL and then file an I-140 for you. The PERM filing date would be your "priority date" (PD). In order to file an I-485 based on the approved I-140 which will come some months AFTER the PERM is filed, you have to wait for the PD to become current on the Visa Bulletin. For example, an EB-3 from India would probably have to wait 9 years for the PD to become current if the PERM were filed tomorrow. That same Indian in EB-2 would wait 4 1/2 to 5 years.
YOUR Immediate Relative (IR) status would be a solid basis for filing a concurrent I-485 with your USC spouse's I-130 the day of or day after the marriage. The IR of a USC has a visa immediately available to allow concurrent filing for adjustment as long the alien spouse made a lawful entry initially, even if you fell out of status or worked without proper authorization, you would still get a greencard. (Just don't fall out of status for more than 180 days or you can't leave the U.S. without triggering the re-entry bar).
However, a greencard based on a marriage that is less than 2 years old only gets a conditional greencard and requires an additional step of an I-751 to lift conditions around two years after getting the card.