Shifting while turning

Context: I did my country's equivalent of the MSF course last summer, and did the closed circuit test and now I can ride my bike. All of the lessons and exam were done on either Honda CB500F or CB500R. I had also never driven a manual vehicule prior to the lessons, in the 30 something years I've been alive (I was the only person in the group in that situation).

Now, I got myself a little Duke 200. And I have a problem that I never faced with the Hondas. My Duke needs to shift in the middle of an intersection. Every 20kmph or so I need to shift. Going straight isn't an issue (my shifting is still janky but...) what do I do when I'm leaning and turning? I've seen don't do it, you'll lose traction to the rear wheel and fall, and on the other end do it it's no big deal.

The course manual has nothing on the subject, and when I told the teachers last summer I was struggling to figure out the clutch I was told I'd get the hang of it. Which turned into getting screamed at for not following close enough on group rides because guess what, I was struggling with upshifting (but I digress).

Any tips/tricks/techniques/advice or I just go at snail pace until I leave the intersection?