It is starting to look decent. Content is missing though, not sure what I should so with the old site. The databases are accessible (i think), so I could move the old wp here, but not sure if it’s worth the effort.

Yeah, things are going to look a bit strange/ugly here for a while. Few notes:

So I updated WP and something went terribly wrong in the db and the old site is now unusable. And the error message doesn’t help. New WP instance up and A New Start.