If you don't already have an online simulator account then, yes, you will need to create one. If you already have one, you can reset your password by clicking the "forgot password" link on the sign in page.
Yes, the online simulator is included in the academic subscriptions, but there is a different server for the academic users. You will need to go here:
Create your account at the above link. Then, you will need to enter your subscription code to activate your subscription. The subscription code will have been sent to the person that purchased the subscription.