@wiredupjax
Right, so up at the top (just after your trigger as they can't be included in a scope), click Add an Action and look for scope.
Add that as your first step after the trigger, and then start dragging the rest of the actions into the scope.
Once most of the flow is inside the scope, you can now add the stuff that you want to do if it errors out after (outside of the scope), as an example, maybe you have your trigger, a scope with the whole flow in it, and then a Send eMail action.
On that Send eMail action, you do Configure run after, and select Error or Timed out for the previous action (which will be the whole-flow scope).
Here's a simplified version. Inside my scope are all the steps for my flow:

Keep us posted.
-Ed