Need mesh system for 3000 sq ft home. - eviltoast

For about a year now, I’ve been struggling to get a good connection in the upstairs of my two story home, around 3200 sq ft. I game a lot, and I have a netgear router modem combo, which does fine downstairs as it has a 5g and 2.4g network. But as I play on a ps4, which can only connect to a 2.4g network, I’m really struggling to have a good connection, also in some other rooms on the second floor. I’ve been considering Eero mesh system, as I only have two Ethernet ports one downstairs which my router is connected to and one upstairs (we have to pay extra to use that one so we can’t currently), so I’m trying to find a mesh system good for this. I’m not really good at dealing with network stuff so can someone please help me out here.