There's another way you can go that's even better, but if you're just in an apartment it's not really necessary. If you move into a house later on, it's absolutely the best way to do things.

To understand this, you need to understand that what you think of as a "wireless router" is actually three devices combined into one: router, switch, and access point. The router moves data traffic back and forth between different networks, allows multiple devices to share the single IP address that your ISP gives you, blocks unwanted internet traffic from reaching your network, and assigns IP addresses to devices on your network. The switch is what gives you the four Ethernet ports on the back, it moves data around within a network by keeping track of what's connected to each port and only sending data it receives to the correct port. It's actually a six-port switch, the other two ports are internally connected to the router and access point. The access point is the part that does Wi-Fi, it's the "wireless" part of a "wireless router".

So, what you should do is pretty simple now that you know this. Instead of getting a "wireless router", you can get your router, switch, and access point separately. This has three big advantages. Each device can do its job better as it doesn't need to do two others as well, you can put them in different places that are ideal for the function of each device, and if you need to replace one of them, you can keep the others.

For example, this is a router. You'd connect its WAN port to the modem or ONT, and the LAN port to a switch, such as this. You'd connect any Ethernet devices to the switch as well. Lastly, you'd get an access point and connect it to a PoE port on the switch, which will allow the switch to power the AP through the Ethernet cable. This can be expanded as far as you need it. Need Ethernet ports elsewhere? Connect another switch to the first one. Need Wi-Fi there as well? Connect another AP to the second switch. You get the idea. The only downside to all this is that everything needs to be connected with Ethernet cables, so it's not really feasible for an apartment.