I'm trying to make something like a interactive button which would serve as Quick Time Event thingie.

During some specified event such button appear for like 3(?) seconds.

If player would push it something would happen.

If he wont something else would happen.

Not exactly sure if that's even doable but i sure would love to use something like this in my mod.

So anyone can point me at some guide/wiki/tutorial or anything that would give me any explanations of how to make it happen?

The first question is, do you want this button on the UI or in the game itself? If the latter, then it is an activator that you can attach a script or action to and has nothing to do with the UI. If the former, not sure why you would want that unless it was like a cutscene type of thing to introduce your mod. And you would not need the UI for that.

PC players are used to interacting with items in the game world (activators) and items on their keyboard. Either of those would do the job you describe, so why add another?