You will need a green card or employment authorization to work for a US airline as a pilot in the USA. They will not sponsor you a work visa so don't even think about that option.
You would need a FAA license and could convert or train here. There are still many unemployed airline pilots here, some with many thousands of hours.
Hire is trickeling back to life but very slowly.
Pay is bad and quality of life miserable for new FO's, especially at the regional airlines which is where you would start off.
Think carefully and do your research.
Good luck.