So… you could simply call up your HUD within your Player BP (your character’s Blueprint):
Begin play > Create widget > Add to viewport.
And to get direct references from your player, you can use the node: “Get player character” which will look for the current player index used, it works well.
Need help with the system for showing the names of items when the player passes over them?
One more question to help you:
Is your game in first or third person?
And just one tip with all due respect: “Blocks” you meant the nodes 
, if you say nodes, people will understand that they are the nodes of the blueprints, it will be better for undestanding.