Help with my first serious database design

Hello, I need some help designing my database for a php website.

I have many main typology that is the application field for example: warrior, mage ecc.

I have category which can be like: leather object, metal object, ...
a category can have multiple typology for example, a warrior can wear leather and metal, and a mage can wear leather but not metal.

Each category have 1 link for show a image of category big and a link for show a category n the menu of a php page. Have a language too to display description in different language too.

Each category has many product inside. Some category have the same product inside. For example, a warrior can use leather -> leather tunic
a mage can use leather -> leather tunic,
So the same product can be of 2 category.

A product has many model (rear view, front view, color red color black etc)
some product has a kind of technical chart, while some other product has another kind of tecnhical chart
e.g. (for a leather armor, don't want width while for a metal armor i want)

IS it ok? Or i have some concept flaw?
thank you so much!!