You should be able to upload a copy of your current vehicles insurance for now. I have done this, and it gives you an option to replace the insurance document at a later date so it's not an issue and I have seen it recommended on posts here. I do not know if it helps to get your VIN sooner, but I am sure it does not hurt. I got my first estimated delivery date a day or two after I uploaded my current insurance. You will see the VIN right on that page, and should also receive an email. It will allow you to set up delivery soon thereafter.