Here's the breakdown of how the diversity visa program or green card lottery actually works.
here where you apply:
https://dvprogram.state.gov/
you can check here if you your job need at least two years of experience or training so you can use it in stead of a diploma.
https://www.onetonline.org
explanation about required photo:
https://travel.state.gov/content/travel/en/us-visas/visa-information-resources/photos/photo-examples.html
#dvprogram
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