Question Manage flow of Ui elements. Best practices

Hallo everyone,
for my game I want to implement a flow manager that controls when which ui element gets shown.
E.g. I have an introduction phase where on start of the game the single ui elements get explained.
What I want is like:
On start -> show this ui element that exlains field 1
When Button clicked go to next ui element and show that explaination.
and so on.

So basically I flow controller. But I didn't find a good example on my research yet.

I thought about doing it with coroutines so I can control the flow ether by time or by state.

 

Sry, Thanks a lot