I am so sorry I did not receive any notifications about this topic ! I came back to the forum to check the last update on Affinity Publisher...
I started the tutorial but due to bugs in Affinity Designer I did not completed it. I was quite busy and I was waiting for a new release of Affinity Designer to make the tutorial without bugs and to be sure that everyone would be able to follow along.
Yes, I am complaining about Affinity Designer for some reasons, it's a great software but it lacks some important features (related to text, shapes, etc.)
SO ! I will try with the new beta of Affinity Designer to make the tutorial. If it works, I publish it on youtube, if not, I upload the project file here.
Sorry again for the delay.
PS: You are quite close to the solution guys ! It's a mix of all the technics you mentioned