I can recommend https://www.dataplicity.com, even thou networking and servers management is my bread, I still used it for my mycodo because it is simple and it is enough:)
You can forward the web interface (I still recommend that you enable https) to a random domain that is assigned from dataplicity (like, my old pi’s mycodo was on Dataplicity Port Forwarding). All in web interface. You can also access the terminal and reboot the pi in case the web interface stops responding.