As your internship will be 12 EC. The other 18 EC willen be gathered through mandatory courses.
An internship abroad is only possible in case similar courses (approved by the exam committee) can be taken abroad.
Below you'll find a few advised schedules, which should not cause a delay in your study programme.
1. Part time internship
Choose one elective in each period. This gives you the opportunity to spend enough time on your internship during each period.
2. Part time and full time combination
Start your internship on a full time basis in the summer and continue part time in period 1.
Now go check out the available internships on UvA Job board