I reckon if they're going to take your licence from you then they'll have you up in court anyway. This can be a good thing ; it gives you a chance to do a bit of crawling and showing respect for the law. You've only just got the car and admit to getting a bit carried away, shit like that. Just don't admit to knowing what speed you were doing. Give it lots of apologies and big tears if neccessary. Anything that makes the court think you'll be a good boy in future is worth it if it keeps you on the road. Best of luck mate, hope I don't read about you in the local.