UI "Storyboard"

Hello
In my game, i want to have multiple UI that on iOS could be called as Storyboard (my game (if i finish it lol) will be iOS/Android/PC) but how to implement that in Unity ?

Should i create one canvas for each scene needed ?
Then,how do i make the transition to another canvas on a button click, if possible i'd love to have a sliding transition ! That would be perfect !

Thanks a lot !