One of the most important and most confusing things about dating in Sweden is that it's not dating. So don't call it a date.You can ask out a classmate for fika, but not a date.
After you've had fika a couple of times you can move on to other activities. Maybe suggest cooking a meal together or going ice skating. Dinner and movie won't come until much later - but even then, call it dinner and a movie, not 'date'.