

Chuck made a great video explaining that. If I remember well, he suggested 2 Wi-Fi, one to connect to the hotel Wi-Fi for example and the other to distribute a secure connection to your gears. I guess you can do the 2nd one through the Ethernet port of the Pi: here you go.
Noted, I plan to connect to my iSP using the USB port, and then the WiFi to distribute the internet at home on a local-based network.
Found this video, seems quite straightforward: NetworkChuck - RaspberryPi router
Fixes IP for me, but I admit I don’t have a lot of services to access to like OP does