Sign. Many years ago I started learning to sign thanks to a hearing and vocally impaired gentleman I knew at the Atlanta Union Mission. Since then, I have cracked a few books now and then to improve on what I had learned but it just doesn’t have the same learning experience that comes from a one on one type of tutoring.
I wish some immigrants would make an effort to learn English. We have two Spanish speaking radio stations and a newspaper in Spanish. Assimilation doesn't seem to be on some of their minds.
I took my daughter to the Bill Rice Ranch, Tennessee for a retreat after she found Cathy Rice's Deaf Sign language videos. She worked hard on both, being autistic but learned a lot. I am not sure if they are still open to hearing people.