After the arrest, the clerk's office will schedule your first court date called an arraignment in front of the judge. If you do not have an Attorney, the court will read the charges and ask you to enter a plea either guilty, no contest or not guilty. If you enter a guilty or no contest plea, then the court will adjudicate you guilty of DUI and impose a sentence which could include jail time and probation.
A guilty plea is essentially the same as a "no contest" plea. A conviction results in either case and you can never seal or remove that mug shot, arrest record, or court record of the conviction. Entering a plea at arraignment is not a good idea because you will not be eligible for a hardship license until after you've completed DUI school.
Trying to resolve your case without an experienced criminal defense attorney is not a good idea. Before entering a plea, at a minimum, you should review all of the police reports and watch the video at the roadside or at the police station.
We can talk about the evidence in your case before considering a plea to the charges. Many of these cases are reduced to less serious charges such as reckless driving. I always fight for a reduction depending on the facts of the case and always explore all areas of mitigation that the prosecutor should find relevant in determining whether to offer a plea to a lesser offense