I mean, it's advice from someone on the internet, are there any studies to back it up?

Edit: I missed the study linked at the bottom.

I floss after brushing, just because brushing removes a lot of particles. If I floss before, there is just so much more flossing I need to do to get everything out. I learned another thing recently, to use a proper brushing technique, I think it's the modified Bass technique. I also make sure to let the bristles go underneath the gum line.