To install Tor-browser in Android Orbot is needed, can be found here:
After that install Tor-browser:
Do not install Orfox from F-Droid, it is the old version of Tor for Android.
An issue you can experience due to some apps from F-Droid (and maybe from Play store too?) that cause Orbot to crash is loss of connection.
It is not Android, not /e/, not the build of version 0.2 Oreo, and not version 0.5, but some apps in F-Droid can cause Orbot to crash and after that the WiFi is blocked!
The solution for this is to reboot in recovery > Wipe > Advanced Wipe, select Dalvik/ART Cache and Cache > Swipe to Wipe > Reboot System, and you are done, connection is restored.