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Problem understanding CMS

I am having problems with understanding CMS. I’ve watched the webflow videos and other videos on youtube but I just can’t get my head around the proper practice for my need.

Product page
Lets say I have 6 products - signs, venyl, big format print, small format print, clothing and stickers.

Now, I have for example 4 different type of signs I want to show case under its own sign page. Same with for example big format prints, and all the rest of the products mentioned above. They all have different sizes and they all are to be placed on its own page. And I need 1 page with the 6 product categories. How can CMS help with this?

I do not have a site project site to share. I would greatly appreciate precise and dummed down feedback. I am totally stuck on this one.

Here is my public share link: LINK
(how to access public share link)