Hi Bubble. I too had never used c# (well a little with Unity) or Visual Studio.
I looked at the Lua/Interop guide and although it looks very daunting. Once you just copy the code and modify, plus some experimenting of your own, in an hour or so you will understand it. Its easier than it looks so domt be afraid to jump into it. You will really benefit from this. Within a couple of weeks I was making my own classes and incorporating that using what Corona had Joshua had provided and some more experimenting it doesnt take long. There are still some odd bits and pieces that I am getting to grips with mind you. Most of the time you will be using just the xaml and main cs
There are three ways for ads that work so far. Google banner, Windows Banner and Windows Interstitial. The easiest ones to work with are the banners and It really is like drag and drop. You dont need to know about Lua Interop for this unless you want to hide them at runtime
The guides that Windows and Google are really straightforward. If you follow them you cant go wrong. But you must take these steps:
Download the SDK
Get the DLL out and put into your project folder (right click properties of DLL file and "unlock" fist as it cant be used.
Add as reference in VS by right clicking references/add/browse to your sdk
Make sure you check the device capabilities in the manifest and add whats required by the guide
Now if using Interstertials or any code thats triggered/created by your code you do this:
Add "using" and then the DLL file at top of your main.cs (or whatever CS will be doing the code)
Then copy code into relevant places inside your class bit. Then if you want to trigger this at runtime you want put the code into a new void function and trigger it with Lua Interop - easier than it looks trust me. I would just get it working first though by the guides
IF using banners then these arent created by code normaly so you add them into the designer view as an object. You just either copy the xaml code in including the reference to the SDK (which goes near the Corona one)
Or even easier you can go to the tool box and drag drop the view controller/or ad control (I cant remember depending on Google or WIndows ads) onto your designer view which is the view you see with Corona on a picture of the device. This will automatically add all the info into the xaml where you can edit or add details for the ads. Job done!
I would really read up a bit on whats and where things go in c#. I only know as much as what I need and it took a day or two to get my head around. Its really worth it. If I want to do something in c# I look it up and trigger it with Corona.