Key navigation in widget


I’m currently making a game with quests and I need some help. When the player has several quests to do, I would like them to be able to select one, to display it in another color.

The player will just have to press TAB and the quest below is selected, and so on until the last quest and then go up to the top one.

Of course, I tried several techniques such as the focus on keyboard, but I couldn’t do it…

I put some screens for you to see my blueprints and my widgets.

I’ve tried to search documentation about this but i didn’t find anything useful for me.
Can someone help me with little tuto pls ???