You can make an appointment for a meeting with the student adviser via https://et.planner.utwente.nl/. These meetings generally take roughly 30 minutes. Sometimes it might turn out to be useful to meet more often, in that case a follow-up appointment is made after the meeting. If you have short questions, you can also visit the open office hours on Tuesday, from 12.30 to 13.30 (except during academic holidays). You can also send (short) questions to the student adviser by email.