If you're behind cgnat opening ports on your router won't do you any good. You have to call your isp and ask them for a dedicated public ip, usually for a price if they offer one at all. If that ip is static you can remember it, if not, you need ddns. If you're one of the lucky few not behind cgnat then yeah, your setup will be the simplest possible, but if you are, like the majority of people these days, it's one of the most complicated.