Should I focus on blogging or linkbuilding?

Content is King. Make sure your content is high quality. Then do link building.

Both go hand in hand! both need equal discipline, planning and focus!

good content making is really tough. but if you can make it , it will attract more traffic. link building is also necessary and more easy comparatively content making. but, for long term higher goal, you need more good content.

I would create blog posts and do the onpage-seo. Next to that I would just buy high quality links in your branche from a seo agency or a website who sells it directly - thats not too difficult to get really good links - the most work will be your articles/content. I can assure that backlinks are still the most interesting thing for google and not any fancy social signals (that's my experience in 2018). Good luck BlueBuzzy!

Both parts are good enough