Could I have a green card and how much do I have to wait if I’m a Portuguese and have an American father?

It depends on how old you are and whether you are now in the US in some other lawful status, unlawfully present or outside the US. Can you please clarify.

Depending upon your situation, you may have derivative US citizenship or be able to obtain a greencard. You and your parents should set a consultation with an immigration attorney to fully review your options.

You can obtain a green card through your father. How long it takes depends on how old you are and whether you are married. You should consult with an immigration attorney for an assessment of your case.

Your question requires an attorney consultation. It is not a simple question that can be answered on this type of forum. There are many factors that would need to be considered and evaluated. I strongly suggest that you contact an experienced immigration attorney for a face-to-face consultation and give him/her all of the facts surrounding your situation. He/she would then be in a better position to analyze your case and advise you of your.