How i update a variable inside my widget blueprint from my blueprint actor and make it to work even if blueprint actor have more than one copy (instance) in the game?

Development Pipeline & Plugins Editor Scripting
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Hi I’m trying to replicate this and also having issues. In my Door BP (which has trigger box) I have built the ‘eventbeginplay->create widget->set->add to view’ as you showed above. But in the same blueprint I’m trying to recreate the ‘onEventOverlap’ chain that you showed above… with no luck. In that picture, I don’t know how to create anything to the right of ‘castTo3rdPerson’ (except for the name variable, I have that).

Been pulling my hair out on this for days. Thanks for your help!