You can get married in the U.S., or if you prefer back at home, and then apply to immigrate under a spouse visa. You should be sure that you maintain lawful status while in the U.S. - don't overstay your visa.Quoting bluemoon97
Once you have your green card, you can attempt to sponsor your son for immigration into the United States. The USCIS offers details here.Quoting bluemoon97

