Well, this can certainly depend on your state, area of residence, and even the officer that pulled you over. I know that, at least in some states, going 20 over is considered a felony. However, considering it is your first offense, one of two things would likely happen. One, if you’re lucky, the officer will issue you a warning, and log it in the system to let other officers know in the future that if you are pulled over again for speeding, you’re a repeat offender. Second, they may issue you a ticket, which typically is a fine and points on your license. You can appeal this in court by using your clean driving record, and they typically reduce or expunge your ticket. Bonus, if the officer fails to appear, you can request that without a witness the charges be dropped. This is why, when given a court date, many ask for another day to appear. As the first date given is typically one the officer can show up to, whereas one that you request has a lower chance of the officers appearance.
Essentially, it depends, but there are ways to get around or reduce your consequences.