Frilansöversättare

Hej!

Excuse me for writing in English, but my Swedish (in terms of grammar) is not so good, so not to be clumsy I'm writing in English :)))

I was wondering what is the process of registering as a freelance translator in Sweden like? Is the registration to be done at Skatteverket? And which option is better in terms of tax paying (to register as a self-employed person or to pay some copyright fee/tax)?

I would be extremely glad if somebody could help me in getting to know more about this. 
Thank you in advance!

Ha en fortsatt trevlig dag! :)