How would affect if I want my son to become resident (i am resident) but I will make the papers in my country?

Answer 1

Apply for a resident visa of your son in the place where you are now and not in your country.

Answer 2

You can ask the embassy if you can apply there (saves time because you can apply for everything at the same time) there. Otherwise, apply for an I-130 by mailing the application to a U.S. service center then apply for the I-485 at the embassy in your country. It takes 6 months to 10 years depending on the circumstances so a K-4 visa may be available so he can enter the U.S. while waiting for it to be considered.