newroman

Ok! Yes, this is only about style.
Then it would work like this:
– code editor in Gutenberg for html
– custom css applied with page-specific class as described here https://wpastra.com/docs/how-to-add-custom-css-for-specific-pages/

Thanks again! It was super useful

Thank you both for your replies!
A child theme is an interesting option and I am reading to learn more about it – thanks for the docs, and for warning me about the risks.

Just one more question on this: will I be able to apply the new style to just one single page, or it will apply to all the website, just overriding parent theme?

Thank you Willem0.
I checked, and the installation is apparently perfect, according to Softaculous.
You’re right, there must be ONE starting page, but I don’t understand how I manage that.

Thank for your solution, I will try it eventually. Still I would like to figure out the problem, at least to understand how it works.