received my first II from here earlier this week, when I went to sign up the only interview dates available was the day after i received the invitation and later in January so signed up for the later one in January because I have not practiced/prepared at all for an interview yet. Went back into the portal and looks like an earlier date in mid Dec is now available. Should I see if i can change the date or take more time to prepare? Want the best odds for my application but know the later you interview the less spots