Absolutely AVOID 192.168.x.y.
If you have the same subnet on both side of a Router, most often Routing wont work.
Learned the hard way.
Basically avoid 192.168.x.y and 10.z.x.y altogether.
Also look here (browse down to the list):
https://www.softwaretestinghelp.com/default-router-ip-address-list/
The article says IPs of wireless routers, but in my experience it is any kind of router.
I am not telling what IPs we are using, but I suggest selecting a scheme that is not commonly used with routers.