Month-to-month subscriptions renew on the 1st of each month. If this is your first time signing up, you will be billed immediately for your first subscription. Afterward, you will be billed every month on the 1st of the month for your next cycle.
If you have purchased a 3 or 6-month subscription, you will be billed once for all of the months you have purchased. Multi-month subscriptions automatically renew unless you cancel by the last day of your subscription cycle.