I need internet and wifi but it's complicated

Your phone doesn't have LAN ports and that is a requirement of the OP. I would suggest that the Cradlepoint MBR95 (there are more expensive models if you think you need any of the additional features) would do the job best. I use the WiFi as WAN in the few parks we find that have usable WiFi where our RV is parked and it's a simply 1-2 minute process to change from the previous to the current parks connection. When that's not available I use a cellular air card in the same device to maintain my internet connection as well as my in-house network. The Cradlepoint can also use your phone's hotspot feature as "just another wifi network" for those times you can find park wifi.