Nothing really "wrong" with waiting until you're 18 to get your license. I was 18 when I got mine, mostly because I worked during high school and had trouble getting the required 50+ hours of practice, plus my mom was super controlling and would never let me take the test. On my parallel park I was sticking out too far and I failed the uphill park (didn't turn the wheel the right direction) but the guy still passed me. Most of those testers are really rushed and have like 500 kids to give licenses to in a day so they're not going to split hairs over every move you make. Mine hardly said two words to me other than the test directions. Once I parked in the lot he signed off on the sheet and gave me my copy saying, "Okay, that's a pass." and hopped out. It was the most nerve wracking 15 minutes of my life, though. I was nervous as **** lol!