Help for understand some concepts with UObject

Thanks. I think i need a instance but still not sure how to do what i want. I now i missed a concept for create what i want but not figure what.

I will try working on more complete code for show more explicit my problem or.

But idea simplified i have a function that call other functions in the code (not same class where i have AddString… ) that generate let say when i call it from BP 4 strings, one each, i want be able add “AddStringToArray(thisString)” in each function to send to a another class for store in a array, for access from BP to this array.