Swedes tend to be nice but reserved, which means it can be difficult getting to know them. Don’t mistake their shyness for rudeness, it’s not meant that way. If you want to become integrated and make Swedish friends, it’s very important you join groups and clubs that revolve around your interests. Most Swedes have very busy lives, so it’s easier if you fit into their schedule (like a weekly meetup) than if you expect them to make time for you specifically.. at least until you get to know people better. Look for local art/craft classes, music groups, gym classes, etc.

Cost of living shouldn’t apply too much, if room and board are paid. Normally, food costs 1500-2000/month per person, rent ranges from about 2000 for a studio to 4500+ for a place with 2+ bedrooms, and bills should be under 1000/month. You can get great internet for about 200kr, and my mobile plan was 150kr. Cheap clothes can be found at H&M, for under 200kr/item.

Skype or Vyke will be the cheapest way to call international. The other option is an international phone card, I wouldn’t use a mobile plan for this purpose because it will always be more expensive.

Swedes are likely to speak English to you until your Swedish is good, they usually appreciate the chance to practice their English and find it easier to converse that way. It can make learning Swedish hard, but if someone answers you in English, just continue on your part of the conversation in Swedish. Eventually people will understand that you want to speak Swedish, and maybe switch back over.
References :
American in Norway, lived in Sweden 5 years

Also yeah they are friendly and good people
References :