Newbie - Where is there info about building a site with Concrete5?

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So We are a design firm. Our art dept create PSD files, I break them up in html. How do I take these finished html files and stick the blocks in specific divs?
I don't want to start with a Concrete5 template, because its too constricting... I know that you can do this. But I can't find any specific info how to do this.

Also is there a place that has the list of php tag (concrete5 block tags) that I can insert into divs?

Do I need to make a separate template for each page?

What if each page has a different layout, then each page needs to have its own template?

I'm impressed with what I've seen so far. But trying to get info is a bit confusing...

Thanks

ludicrousman