Dear Sakarias
How did it go, have you found someone who can help you with SEO in Sweden?
If you want professional help from a bureau, I would suggest IIH Nordic, https://iihnordic.se/ they work with digital marketing all over the Nordic and have always impressed me with their work.
I would advise you to look broader than blogs and article catalogs, as you need a well-rounded link profile, and too many blogs and article catalogs can look spammy and fake to google.