Fortigate/Arista VRRP Question. Looking to get information from anyone who's implemented this before.

We are currently migrating our datacenter to two separate datacenters for DR reasons. We are going to stretch multiple VLANs across a Layer 2 connection provided by the datacenter and will implement VRRP on the Arista L3 switches and Fortigate Firewalls for failover. One VLAN terminates on the Arista switches and the rest terminate on the Fortigates. I'm not sure where to implement VRRP virtual routers... would I turn that on for each VLAN Interface on the Fortigates and the Arista? If anyone could provide any info or suggestions as to how you have implemented this, it would be greatly appreciated. Just trying to get as much info as I can before we test the cutover. Please see Visio with changed IPs and VLANs. Thank you.
https://imgur.com/a/IWF6Nl4

Edit: Allow me to clarify. Traffic would only be routed to one datacenter at a time. We plan to failover MPLS and Internet traffic by setting community preferences on the BGP AS community. So if one site goes down, we'll use rapid-dr to move the VMs over to the DR site and VRRP will allow the DR site's equipment become primary.