Due to your country of citizenship, I think the main option for you is to find remote devops work for a company that will take a chance on you :) A certification won't be too helpful-- you'll just need to convince the owners of a company that you can do what they need.

Alternatively of course you can marry an American and find legit corporate work as a traditional W2 employee :)

Our immigration system is horrible and a national disgrace-- I apologize that the government isn't more welcoming to you.