System: Ubuntu 18.04
solution: tools: iw, hostapd, iptables, udhcpd, udhcpc, macchanger
This is where I started: How do I create a WiFi hotspot sharing wireless internet connection (single adapter)?
The answer replied by Purushoth is not correct
I couldn't find "Edit Connections" from gnome desktop environment, so I tried other tools I could find (nmcli, nmtui).