Can't get devices to connect to internet on OpnSense VM

[zack2137]

I apologize in advance if I seem noobish as I am very new to OpnSense. I have searched all the guides, forums and googled as much as I could; but have not been able to resolve my issue: I cannot get any devices to connect to the internet through my firewall.

I am running OpnSense on VirtualBox on Windows. My firewall PC has 2 NICs. It's for a home network and my goal is using a firewall and VPN in this configuration:

Modem<-->Firewall PC<-->OpnSense VM<-->Router<-->Devices

To retain internet on my LAN, I have my Router connected to my Modem, my firewall connected to the Router, and another PC connected to my second NIC to test connectivity. My current issue is that I cannot get the other PC to connect to the internet without using ICS or bridging both adapters. How do I configure OpnSense to route my traffic from my WAN to my LAN interfaces on my VM?

I am able to access the internet on OpnSense. I am using a VPN and set it up on OpenVPN and I am sure it's running correctly (using:
curl https://myip.com
I get an IP provided by my VPN so I'm positive it's working).
For my interfaces I have:
WAN: em0(NIC1), DHCP4: 192.168.0.238, NO IPv6
LAN: em1(NIC2), 192.168.1.1, NO IPv6
VPNInterface: None/None

I can access the GUI but only on WAN and after creating a rule to allow all for firewall WAN.

I feel like I've exhausted all other resources available to me and would sincerely appreciate it if someone could please tell me what I'm doing wrong or point me in the right direction.

Thank you!!