buellrider97 - your network has to have 1 main router that connects to your isp modem that sets up your wifi ssid (you only need 1), port forwarding, and other parameters and then your 2nd and more routers are setup as a wired or wireless bridge network. This is if you use a non-mesh network. In my older homes, I used to use up to 4 Linksys routers setup this way. When you do it correctly, each router is invisible to you or your device. You never connect to a specific router, you connect wireless to the ssid that all routers can respond to. Even when you are wired, the router routes your packets to the appropriate router or isp network depending on what you want to do.
For mesh networks, (only get a WiFi 6e or newer mesh setup), they provide software that sets up the main/first router, then adds the additional mesh routers, which is basically a bridged network but uses the proprietary backhaul connection for the mesh routers to talk to each other. In a mesh setup, you still configure 1 ssid (if you have 2, get rid of 1), and all the other mesh routers implement dhcp based on the main router.
This is a basic setup that will work fine for everything you want to do, but there are other options like setting up DMZ’s/vlans, etc.