Ohmow, I understand you want to learn how to play MoW and you just have a demo at the moment.
You need to know that MoW AS is mainly for MP and MoW MP has a huge learning curve and the interface is just the beginning.
I’ve played something like 100 online battles and I am still a noob. I guess MoW AS attracted many hardcore MoW players who are way out of my league. That’s why I won’t go for it.
My advice to you is: buy MoW. You can get it cheap and it is a very good game and a much better tool for learning how to play MoW coz it has a larger and more diverse MP community than AS. I see that there is a steady influx of new players so you will easily find somebody who would like to experiment with you.
And I believe you will find help very easily on this forum on all sort of problems, not just the interface but you need to get into the game first and start asking specific questions: like how to use binocular or on which map and when is it best to use Comet?