Hooking up a Domain Name (Reserving a Public IP)

I had a read through this:

https://msdn.microsoft.com/en-us/library/azure/dn690120.aspx?f=255&MSPPError=-2147217396

and a little bit of this:

https://msdn.microsoft.com/library/azure/dn690118.aspx?f=255&MSPPError=-2147217396

I'm pretty confused. When you buy hosting with anyone else, a fixed public IP address is standard and simple. It's absolutely necessary because without a fixed IP address, you can't hook a domain name up to the hosted service. I don't understand what we're supposed to do...

So, is there a step by step procedure we can go through to

a) Set up a fixed public IP address for our IIS server

b) Allow endpoints to be hit through this IP address (i.e. allow RDP, and HTTP access to this server via the IP address)

c) Allow the domain name to be hooked up to said IP address

d) Hook a certificate up to aforementioned domain name and IP address.

Microsoft, please make this simpler!

Thanks