Yes, your main focus should be on the core business. Everything else to do with tax, licensing and so on you can get help with. It is a good idea anyway to get yourself a trusted accountant who will know many of the answers to the questions in this FAQ.
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There are own organizations that can help start up businesses. E.g. https://oppstart.no/
Furthermore, there are several banks that also offer this kind of help e.g. Sparebank 1 SMN, Danske Bank or DNB.