How to Split existing and new contacts in automation

Hey Guys,

We have just moved from Active Campaign and on the PRO package, we want to set up a welcome sequence where new contacts will go one route and existing contact down another.

I cant seem to find how to do this, here is our plan

    • Tag gets added (any contact)
    • Safe sender email to NEW CONTACTS ONLY
    • Event Email to ALL
    • End Automation to EXISTING
    • Enter Welcome Sequence to NEW ONLY

Any help would be great, thanks!