I have never used port forwarding before.
I have signed up for a free host name with no-ip.com. I don't know whether the actual name exposes me, but let's say it is 'abc.ddns.net'.

I have downloaded and set up their DUC piece of software and have 3 green ticks.
In Unotelly in the DynDNS Update section I have added my host name i.e. abc.ddns.net.

However, I have not set up port forwarding on the router.

On the Router I entered:
Mapping Name: Unotelly

Then used 'Add port mapping application' and scrolled to bottom to 'Add port application'

I entered:
Name: Unotelly
External Port: 80 ~ 80 (is 80 the correct port?)
Internal Port: 80
Protocol: TCP/UDP
and saved.

Now I enter:
Application: Unotelly
Internal Host: ??? I thought I needed to add my routers IP address i.e. 192.168.1.1 but it wants a 'hex' addresses.

Should the hex address be my PC. or my router?

I start DUC running as soon as my PC starts and also as a Service.

If I set up the Router correctly, is that the end of the setup?

If my PC is not running then I assume Unotelly cannot get my (external dynamic ) IP address.
But if the PC is logged out, can Unotelly get my IP adress?

Once everthing is setup on the Router, how do I know that Unotelly is getting my IP address?