Ah I see, no worries!
To get functionality you will need to do some “coding”. I put coding in quotes since you won’t be writing this by hand (but you could if you wanted), but instead using the blueprint coding system of Unreal. You can find that section by clicking on the top right button labelled “Graph”
This channel seems to have some good tutorials on UI with widgets.
With this video showing some good practices.
At the end of the day though, to get anything to work you’ll have to get your hands a little dirty. If you want direct examples on how you might do exactly what you’re looking for, that might be a bit more difficult to come by - but as you learn what blueprints can do I’m sure you’ll be able to do nearly anything you want!