Do I have to wait until my trial is over before becoming a paying subscriber?

Yes, but you can enter your credit card details at any time during the trial period. Here's how:

1. Once logged in, visit your user profile
2. On your user account page you'll see a section called Payment Details. Click the red Edit button to add a card. Once entered, click the green Save button.

Please note that trial members receive all the same benefits as paying subscribers.