After subscribing, how can I direct user to system?

I am still trying to set up PayPlans with Joomdle and moodle. I had created an account before installing payplans, called student. I logged into the front page (subscribe) and clicked on the free plan (húngaro aula-amostra) as a test. I tried to enroll student in it. I was able to enroll in the plan.
1. Is there any way to turn off showing the invoice for free plans? It seems silly.
2. After enrolling in the plan, I do not see anything clickable that leads me anywhere. How do I get the student over to moodle so she can access the course she has enrolled in? Moodle should show only the courses included in the plan, automatically.
3. The memberships and subscribe pages (automatically installed by PayPlans) seem to be identical. Is there some difference?
Thank you,
Naomi