I have a host name whose dns points to my home IP. I use this for game servers for my buddies. Should I be worried about my home IP being easily accessible like this, and should I get a physical firewall appliance to protect myself?
Servers are running Windows Server 2019 and Mac OSX.
I recommend building your own firewall. There are awesome, FOSS, FreeBSD-based firewall operating systems like pfSense and OPNSense. You can do a whole bunch of cool stuff with them, like block ads, scan incoming traffic for malware, monitor your network, collect data about your connections and visualize them in a nice dashboard and more.