networking – Configure Netplan for 2 subnets

Wanting to have linux server span both sides of a router. to provide services to home and
vpn connection to a VPS server remotely.

The main router is AT&T issued and cascading router is broken.
Network connections

Main router 192.168.2.254

adgaurd home at 192.168.2.2 for dns from the home router

linux server 192.168.2.10

home router 192.168.0.1
all pc’s and wifi devices.

have 2nd nic interface installed in linux box want to be 192.168.0.10 on the lan side of home router. want to bridge br0 to both 192.168.2.10 and 192.168.0.10 with routing traffic through
it. Whenever connected on lan side of 192.168.0.1, network suffers, reduction in speed and slows down this network.

I thought disabling dhcp, and not assigning the gateway to 192.168.0.1 would prevent this but
Where am I going wrong or are there any suggestions.

current netplan

network:

ethernets:

enp3s6:    # 192.168.2.10
    dhcp4: yes
    dhcp4-overrides:
        route-metric: 100
enp2s0:     #cannot get to operate
    dhcp4: no
    addresses: [192.168.0.10/24]

version: 2

bridges:

br0:
    interfaces: [enp3s6]
    dhcp4: true