Specific instructions are available once you click the "connect" option inside of CAL.
Does that part work? Are you able to go to the server via the web browser using the IP of the machine? The IP will be listed like in the screenshot (although it will show your IP not the test system I just started)
In HANA Studio you should be able to give the IP of the machine, instance 00 and the password you gave with the user "SYSTEM" when you created the instance.