I got my license three months before I turned 18 ... and had my permit renewed three times. Okay, you don't need a permit to get your license at 18. You can just walk in, wait in a line with a number ticket, and tell the desk that you want to take the test to get your license when you get there. You'll take the knowledge test first and it's $20 here but I guess it could be different for your area. When you pass that after however many times it happens to take, they will schedule your final drive with someone who works there. You'll come back in in your own vehicle on that day, have to show that your lights work, you have registration and proof of insurance and will take your drive. It's easy. My drive took like ten minutes from start to finish. Don't worry about renewing your permit if you don't want to but don't get caught practicing (I would still get it renewed though). So many people just walk in at 18 flat without one and go about getting a license. Go to the DOL (Department of Licensing) and ask them if you have questions still. Pick up a driving laws book while you are at it, they help so much for the knowledge test. Good luck, feel free to email me if you want to.
**Permits last a year before expiring in Washington and you have to be at least 15 to get one.
That is for Washington state, your good to go!