Learning Swedish in 3 months

Hi, I'm going to Sweden for 3 months on a student exchange.  I'm a native English speaker.  How possible would it be to learn Swedish during this time abroad immersed in the language?

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Fun fact, stockholm is called "Fjollträsk" (Sillyswamp) in most part of northern sweden .

You have heard of the fredagsmys and Fika, right?