Best thing you can do is get an experienced DUI attorney. Don't try to handle this yourself, you will only be getting in more trouble.
You will need to request a DMV hearing within 10 days from the accident or risk having your license automatically suspended. Contact a local attorney immediately, they can request the hearing for you, discuss the details of the arrest and go from there.
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You start by consulting with a lawyer, in person, in the office to explain the details. There are too many variables for any attorney on this website to explain the possible outcomes. Most criminal attorneys will provide a free consultation.