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Regarding your inquiry about traveling to America, please note that if you want to travel to America for work, you must first obtain a job offer, as you must apply for a temporary work visa at the United States Embassy, ​​you must obtain an approved Form I-129 and Employment Petition from the Department of US Citizenship and Immigration Services. The petition must be filed by your prospective employer no more than six months before your expected start date of employment, and you may not enter the United States until ten days prior to your initial employment start date as listed on your Form I-797 Your or in your employment offer letter
If you want to travel to America to search for work on your own or for tourism or visit, you can obtain a tourist visa. In general, to obtain any type of visa, you must fill out the visa application form, which you can obtain through the embassy’s website after creating an account and starting to The process of scheduling an appointment with the embassy and paying the visa fee at the Aramex service center. You must come in person to the embassy for your interview. You must present a passport valid for travel to the United States within a validity date of at least six months after the expected period of stay in the United States.
As for the duration of the visa, you will determine when you arrive at the port of entry where the US Customs and Border Protection officer, who processes your entry, will determine the length of time you may stay in the country
As for the refusal of the visa from the embassy, ​​you can review the embassy to find out the reason, address it, and apply for the visa again