hi maam I would like to know what is the first...

In order to obtain a visit visa, you have to visit the official website to obtain the visa with a recent digital photo, fill out the application form on the page, pay the visitor's visa fee and attach a copy of your valid passport for at least six months. Reserve an appointment from your residence country. Go to your appointment on time at the US embassy. Take your passport with you and the code that you will be given when you fill in the application form. Also, print the page of the appointment booking, personal photos and fees payment receipt.
The Embassy of America