Can I extend my stay while on O-2 visa? On an O-2 visa, you can ask for a…

How long does it take to get a Green Card from O-1 visa?

You can file an I-485 form to have your status changed once your petition is approved. This will take roughly 6 months, and premium processing is not accessible for this form. Without premium processing, the O-1 visa to green card processing time should take around a year.