If you’re still watching inventory tutorials in order to get things done in UMG, you shouldn’t be tackling something like a visual scripting system. Not saying you can’t ask for help- but you can pick up the relevant info on how you might start to do this from the tutorials you’ve seen. Don’t look at what they’re doing. Look at what they’re trying to do, why they do it the way they do, and how it might apply to your own task.
Depending on how much you know, UMG may be the easiest portion of this for you by the way.