Being a ham radio enthusiast (with limited technical knowledge) I recommend building a yagi antenna for yourself. :) Due to the small wavelength antennae for WiFi can be small too.
Here is a sample project:
https://www.ab9il.net/wlan-projects/wifi6.html
There's plenty of information on that topic, even on Youtube, but I assumed a written howto could suit you more that a video. :)

It might also be helpful to have a solar panel for the internet connection power only.