Joomla experienced – now starting with WordPress and in need of advice

When I first installed WordPress, I tried to make separate pages which each contain separate posts. I wanted every page to have it’s own category. I was used to this way of working in Joomla but I noticed WordPress behaves a little bit different.

I’ve asked 2 classmates and watched a Lynda.com essential training tutorial. This is what I learned. Please comment on it. Is my way of thinking good?

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A wordpress page is static. I can put content on it, but not posts. Not post after post on a page.
A wordpress category cán contain posts, as much as I want. I can have several categories with unique posts in each of them.

With that in mind, and something a mate showed me, I can make a menu and put categories as separate buttons. This way I can have several ‘dynamic’ pages.

So I’m thinking of doing this. Is this good? It still feels ‘weird’ to attach categories to a menu instead of pages. I think I should let go of the word ‘page’ in the traditional sense.
https://www.plaatjesupload.nl/bekijk/2011/04/21/1303399613-010.jpg

As you can see, I want several pages (this time I’m referring to the more general word ‘page’ and not the ‘wordpress page‘ item.), each page is essentially a category with it’s own unique posts. (as far as the placement of the posts go, it’s a template issue. I’ll just search ’till I find something which works this way)

I’d really like to know if this is the correct way an experienced wordpress user makes a website with several dynamic pages. If not, what is the right way?

Better to do it correct now than learn later I’ve made a mistake and start all over again. ??