You totally can!

After selecting a date and time, you can choose Recurring.

Then, instead of having the appointment recur at the same time/date for a certain number of weeks, you can select Choose additional time to add another time.

Please click the screen recording to view what that process looks like:

Yes, if you are a current student you can ask admin@germanonlineinstitute.com to give you access to a list of other GOI students you can make contact with and practice your German outside of your lessons.

You can also add your name and requirements to this list in order to be found by other students. Contact details are through GOI student accounts and thus safe. No need to exchange your private details with others.