Right now none of companies sponsors for H1B/green card. I used to work one of the reputed hospital, they said RN are not eligible to file H1B because on Hospital all (RN’S with Bachelors, associate degree and LPN) fall under the same category. So I would like to advise you please don’t waste your time looking companies who can sponsor you H1 B or green card. Just find another option. I already did lots of research while I was on my OPT. Now I am doing my NP. Even to do the NP you will require at least one year of RN experience in USA. Luckily I got Job on time and able to do my NP. So in these days it is very hard to survive in USA for international Nurses. So I don’t recommend any Nepali student to go nursing.
Good Luck