✔ 最佳答案
The U.S. Consulate determines approval of visa based on a lot of aspects. But the most important is:
a. The applicant must show he/she has intention to return to the place of residence (In other word, the applicant has no intention to stay in the U.S. longer than needed); and
b. The applicant must convince that the applicant will not commit any illegal activities (like overstaying, illegal employment, etc.)
Having a job or school (longer than 6 months) will satisfy "a" above. Having adequate financial resource (self-funding or sponsorship) will satisfy "b" above.
Since you have neither, as well as you have a relative in the U.S., which they have the ability to harbor you when necessary, and you are single, I don't see how the U.S. Consulate will approve a visa to you.
Recommended you to try it later.