I have been working for a year with a green card in the USA. I did this by applying for an EB-3 visa for unskilled workers. I currently work in the hospitality industry. You can find out how to get a green card through work from an article by eb3.work, I usually got the necessary information from their website and articles and read updated information about priority dates when I was waiting for it to become current. If you are going to apply, you will need to familiarize yourself in detail with all the stages and nuances of this process. Also, be prepared for the fact that it can take years, because this is not a quick process.