I solved my problem by deleting Instance01 and create Instance02. It is running and I already go on my training course "AuraDB Fundamental".

I applied trial before I started to enroll my training course. Can I contiune my training course without upgrade to AuraDB professional? BTW, my instance is always "Paused" and don't know how to "Running" again. I have only three days left for my trail.

Hi there, your trial will automatically expire at the end of the trial period. If you've added a credit card, simply delete any instances in your account in order to avoid any charges at the end of your trial.