How to create random button prompts

Sorry for such a late reply, i’ve been under the weather and only just got round to trying this out the last couple days. But im struggling with following on, if i create the text box and have the text of it say e.g “Press E”, even if i want to change which button needs to be pressed the text wont change? So im confused as to the order of how to go about it. As well as being a newbie to unreal, i recognise the terms you are using such as ovveride onKeyDown and array and map but im not entirely sure on how to create them if its not too much to ask and if you dont mind of course could maybe provide screenshots to help me understand better.( i understand more visually than i do from following a set list of instructions) Thank you.