I Should Be Asleep

I'm not though. Nope, I am downloading a photo program and trying to think if hosting my own website is going to be worth the effort. I feel like I am so close since it is accessible to other computers on my network, but I am just lost on the step that gets it to be available for the whole wide world. I tried substituting my WAN IP for my LAN IP in the address, but to no avail. yeargh..