You should be able to set up an account anywhere. It won't let you book the actual VQ reservation until you are inside the geo fence.
To set up the account, open the site and click the Activate Virtual Line icon. Pick a party size - doesn't matter what it is. Enter an email address and a password, then try to click through and it will eventually error our since you aren't in the park. But, you will have successfully created your account.
No, you do not need to link any tickets. This site is completely separate from your ticket, Universal account... everything.