paring out firewall and routing functions.

[megarapper5000]

Hi everyone,
I currently have a condensed vm setup for my network which i think needs to be separated out for security.
I am having a hard time getting my head around the network routing i just need a nudge in the right direction.

I have finally set up and OPNsense firewall, however i would also like the move the routing functions for the lan to another device that will host additional IP services.
Would i have to disable anything extra on the OPNsense?
Additionally, what routes or gateways or default route(s), might i be missing or need to configure on the router or OPNsense?
thanks!

simple diagram:

ISP modem
|
OPNsense
WAN IGB0 DHCP
LAN IGB1 192.168.1.1/30 (Link to router)
|
Router
IGB0 192.168.1.2/30 (Link to firewall)
IGB1 10.10.10.1/24 (Link to switch)
|
Switch EM0 10.10.10.2/24 (Link to router)