its actually pretty simple, theres a event for committing text which can be found in the details panel with the text box selected. using this event you can then just get a reference to the actor you want to set the variable in.
below is an example of what i mean. in the example on text committed i get the player character, cast to identify its class, then set the “charTextVar” which is located in the character bp. i also show some of the options that can be used for committing text on the select node.
