If it helps Feige was said to have had a meeting with all the necessary heads to build the 'multiverse bible' or whatever to establish the rules of what is going on, so it doesn't get confusing. I think the only truly confusing thing that is going to happen is how all these 'multiverse-fathered in' films are going to go, or more specifically when they will get viewed in flow of events marathon.
I'm kinda of the mind to watch the Raimi-3 before anything, then the Webb-2 after Avengers 1. That way it weirdly feels like there was a spider-man in each Phase.